/src/unbound/sldns/str2wire.c
Line | Count | Source (jump to first uncovered line) |
1 | | /** |
2 | | * str2wire.c - read txt presentation of RRs |
3 | | * |
4 | | * (c) NLnet Labs, 2005-2006 |
5 | | * |
6 | | * See the file LICENSE for the license |
7 | | */ |
8 | | |
9 | | /** |
10 | | * \file |
11 | | * |
12 | | * Parses text to wireformat. |
13 | | */ |
14 | | #include "config.h" |
15 | | #include "sldns/str2wire.h" |
16 | | #include "sldns/wire2str.h" |
17 | | #include "sldns/sbuffer.h" |
18 | | #include "sldns/parse.h" |
19 | | #include "sldns/parseutil.h" |
20 | | #include <ctype.h> |
21 | | #ifdef HAVE_TIME_H |
22 | | #include <time.h> |
23 | | #endif |
24 | | #ifdef HAVE_NETDB_H |
25 | | #include <netdb.h> |
26 | | #endif |
27 | | |
28 | | /** bits for the offset */ |
29 | 0 | #define RET_OFFSET_MASK (((unsigned)(~LDNS_WIREPARSE_MASK))>>LDNS_WIREPARSE_SHIFT) |
30 | | /** return an error */ |
31 | 0 | #define RET_ERR(e, off) ((int)(((e)&LDNS_WIREPARSE_MASK)|(((off)&RET_OFFSET_MASK)<<LDNS_WIREPARSE_SHIFT))) |
32 | | /** Move parse error but keep its ID */ |
33 | 0 | #define RET_ERR_SHIFT(e, move) RET_ERR(LDNS_WIREPARSE_ERROR(e), LDNS_WIREPARSE_OFFSET(e)+(move)); |
34 | | |
35 | | /* |
36 | | * No special care is taken, all dots are translated into |
37 | | * label separators. |
38 | | * @param rel: true if the domain is not absolute (not terminated in .). |
39 | | * The output is then still terminated with a '0' rootlabel. |
40 | | */ |
41 | | static int sldns_str2wire_dname_buf_rel(const char* str, uint8_t* buf, |
42 | | size_t* olen, int* rel) |
43 | 0 | { |
44 | 0 | size_t len; |
45 | |
|
46 | 0 | const char *s; |
47 | 0 | uint8_t *q, *pq, label_len; |
48 | |
|
49 | 0 | if(rel) *rel = 0; |
50 | 0 | len = strlen((char*)str); |
51 | | /* octet representation can make strings a lot longer than actual length */ |
52 | 0 | if (len > LDNS_MAX_DOMAINLEN * 4) { |
53 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_DOMAINNAME_OVERFLOW, 0); |
54 | 0 | } |
55 | 0 | if (0 == len) { |
56 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_DOMAINNAME_UNDERFLOW, 0); |
57 | 0 | } |
58 | | |
59 | | /* root label */ |
60 | 0 | if (1 == len && *str == '.') { |
61 | 0 | if(*olen < 1) |
62 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL, 0); |
63 | 0 | buf[0] = 0; |
64 | 0 | *olen = 1; |
65 | 0 | return LDNS_WIREPARSE_ERR_OK; |
66 | 0 | } |
67 | | |
68 | | /* get on with the rest */ |
69 | | |
70 | | /* s is on the current character in the string |
71 | | * pq points to where the labellength is going to go |
72 | | * label_len keeps track of the current label's length |
73 | | * q builds the dname inside the buf array |
74 | | */ |
75 | 0 | len = 0; |
76 | 0 | if(*olen < 1) |
77 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL, 0); |
78 | 0 | q = buf+1; |
79 | 0 | pq = buf; |
80 | 0 | label_len = 0; |
81 | 0 | for (s = str; *s; s++, q++) { |
82 | 0 | if (q >= buf + *olen) |
83 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL, q-buf); |
84 | 0 | if (q >= buf + LDNS_MAX_DOMAINLEN) |
85 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_DOMAINNAME_OVERFLOW, q-buf); |
86 | 0 | switch (*s) { |
87 | 0 | case '.': |
88 | 0 | if (label_len > LDNS_MAX_LABELLEN) { |
89 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_LABEL_OVERFLOW, q-buf); |
90 | 0 | } |
91 | 0 | if (label_len == 0) { |
92 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_EMPTY_LABEL, q-buf); |
93 | 0 | } |
94 | 0 | len += label_len + 1; |
95 | 0 | *q = 0; |
96 | 0 | *pq = label_len; |
97 | 0 | label_len = 0; |
98 | 0 | pq = q; |
99 | 0 | break; |
100 | 0 | case '\\': |
101 | | /* octet value or literal char */ |
102 | 0 | s += 1; |
103 | 0 | if (!sldns_parse_escape(q, &s)) { |
104 | 0 | *q = 0; |
105 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_BAD_ESCAPE, q-buf); |
106 | 0 | } |
107 | 0 | s -= 1; |
108 | 0 | label_len++; |
109 | 0 | break; |
110 | 0 | default: |
111 | 0 | *q = (uint8_t)*s; |
112 | 0 | label_len++; |
113 | 0 | } |
114 | 0 | } |
115 | | |
116 | | /* add root label if last char was not '.' */ |
117 | 0 | if(label_len != 0) { |
118 | 0 | if(rel) *rel = 1; |
119 | 0 | if (q >= buf + *olen) |
120 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL, q-buf); |
121 | 0 | if (q >= buf + LDNS_MAX_DOMAINLEN) { |
122 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_DOMAINNAME_OVERFLOW, q-buf); |
123 | 0 | } |
124 | 0 | if (label_len > LDNS_MAX_LABELLEN) { |
125 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_LABEL_OVERFLOW, q-buf); |
126 | 0 | } |
127 | 0 | if (label_len == 0) { /* label_len 0 but not . at end? */ |
128 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_EMPTY_LABEL, q-buf); |
129 | 0 | } |
130 | 0 | len += label_len + 1; |
131 | 0 | *pq = label_len; |
132 | 0 | *q = 0; |
133 | 0 | } |
134 | 0 | len++; |
135 | 0 | *olen = len; |
136 | |
|
137 | 0 | return LDNS_WIREPARSE_ERR_OK; |
138 | 0 | } |
139 | | |
140 | | int sldns_str2wire_dname_buf(const char* str, uint8_t* buf, size_t* len) |
141 | 0 | { |
142 | 0 | return sldns_str2wire_dname_buf_rel(str, buf, len, NULL); |
143 | 0 | } |
144 | | |
145 | | int sldns_str2wire_dname_buf_origin(const char* str, uint8_t* buf, size_t* len, |
146 | | uint8_t* origin, size_t origin_len) |
147 | 0 | { |
148 | 0 | size_t dlen = *len; |
149 | 0 | int rel = 0; |
150 | 0 | int s = sldns_str2wire_dname_buf_rel(str, buf, &dlen, &rel); |
151 | 0 | if(s) return s; |
152 | | |
153 | 0 | if(rel && origin && dlen > 0) { |
154 | 0 | if((unsigned)dlen >= 0x00ffffffU || |
155 | 0 | (unsigned)origin_len >= 0x00ffffffU) |
156 | | /* guard against integer overflow in addition */ |
157 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_GENERAL, *len); |
158 | 0 | if(dlen + origin_len - 1 > LDNS_MAX_DOMAINLEN) |
159 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_DOMAINNAME_OVERFLOW, |
160 | 0 | LDNS_MAX_DOMAINLEN); |
161 | 0 | if(dlen + origin_len - 1 > *len) |
162 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL, |
163 | 0 | *len); |
164 | 0 | memmove(buf+dlen-1, origin, origin_len); |
165 | 0 | *len = dlen + origin_len - 1; |
166 | 0 | } else |
167 | 0 | *len = dlen; |
168 | 0 | return LDNS_WIREPARSE_ERR_OK; |
169 | 0 | } |
170 | | |
171 | | uint8_t* sldns_str2wire_dname(const char* str, size_t* len) |
172 | 0 | { |
173 | 0 | uint8_t dname[LDNS_MAX_DOMAINLEN+1]; |
174 | 0 | *len = sizeof(dname); |
175 | 0 | if(sldns_str2wire_dname_buf(str, dname, len) == 0) { |
176 | 0 | uint8_t* r; |
177 | 0 | if(*len > sizeof(dname)) return NULL; |
178 | 0 | r = (uint8_t*)malloc(*len); |
179 | 0 | if(r) return memcpy(r, dname, *len); |
180 | 0 | } |
181 | 0 | *len = 0; |
182 | 0 | return NULL; |
183 | 0 | } |
184 | | |
185 | | /** read owner name */ |
186 | | static int |
187 | | rrinternal_get_owner(sldns_buffer* strbuf, uint8_t* rr, size_t* len, |
188 | | size_t* dname_len, uint8_t* origin, size_t origin_len, uint8_t* prev, |
189 | | size_t prev_len, char* token, size_t token_len) |
190 | 0 | { |
191 | | /* split the rr in its parts -1 signals trouble */ |
192 | 0 | if(sldns_bget_token(strbuf, token, "\t\n ", token_len) == -1) { |
193 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX, |
194 | 0 | sldns_buffer_position(strbuf)); |
195 | 0 | } |
196 | | |
197 | 0 | if(token_len < 2) /* make sure there is space to read "@" or "" */ |
198 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL, |
199 | 0 | sldns_buffer_position(strbuf)); |
200 | 0 | if(token[0]=='@' && token[1]=='\0') { |
201 | 0 | uint8_t* tocopy; |
202 | 0 | if (origin) { |
203 | 0 | *dname_len = origin_len; |
204 | 0 | tocopy = origin; |
205 | 0 | } else if (prev) { |
206 | 0 | *dname_len = prev_len; |
207 | 0 | tocopy = prev; |
208 | 0 | } else { |
209 | | /* default to root */ |
210 | 0 | *dname_len = 1; |
211 | 0 | tocopy = (uint8_t*)"\0"; |
212 | 0 | } |
213 | 0 | if(*len < *dname_len) |
214 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL, |
215 | 0 | sldns_buffer_position(strbuf)); |
216 | 0 | memmove(rr, tocopy, *dname_len); |
217 | 0 | } else if(*token == '\0') { |
218 | | /* no ownername was given, try prev, if that fails |
219 | | * origin, else default to root */ |
220 | 0 | uint8_t* tocopy; |
221 | 0 | if(prev) { |
222 | 0 | *dname_len = prev_len; |
223 | 0 | tocopy = prev; |
224 | 0 | } else if(origin) { |
225 | 0 | *dname_len = origin_len; |
226 | 0 | tocopy = origin; |
227 | 0 | } else { |
228 | 0 | *dname_len = 1; |
229 | 0 | tocopy = (uint8_t*)"\0"; |
230 | 0 | } |
231 | 0 | if(*len < *dname_len) |
232 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL, |
233 | 0 | sldns_buffer_position(strbuf)); |
234 | 0 | memmove(rr, tocopy, *dname_len); |
235 | 0 | } else { |
236 | 0 | size_t dlen = *len; |
237 | 0 | int s = sldns_str2wire_dname_buf_origin(token, rr, &dlen, |
238 | 0 | origin, origin_len); |
239 | 0 | if(s) return RET_ERR_SHIFT(s, |
240 | 0 | sldns_buffer_position(strbuf)-strlen(token)); |
241 | 0 | *dname_len = dlen; |
242 | 0 | } |
243 | 0 | return LDNS_WIREPARSE_ERR_OK; |
244 | 0 | } |
245 | | |
246 | | /** read ttl */ |
247 | | static int |
248 | | rrinternal_get_ttl(sldns_buffer* strbuf, char* token, size_t token_len, |
249 | | int* not_there, uint32_t* ttl, uint32_t default_ttl) |
250 | 0 | { |
251 | 0 | const char* endptr; |
252 | 0 | int overflow; |
253 | 0 | if(sldns_bget_token(strbuf, token, "\t\n ", token_len) == -1) { |
254 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_TTL, |
255 | 0 | sldns_buffer_position(strbuf)); |
256 | 0 | } |
257 | 0 | *ttl = (uint32_t) sldns_str2period(token, &endptr, &overflow); |
258 | 0 | if(overflow) { |
259 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_INTEGER_OVERFLOW, |
260 | 0 | sldns_buffer_position(strbuf)); |
261 | 0 | } |
262 | | |
263 | 0 | if (strlen(token) > 0 && !isdigit((unsigned char)token[0])) { |
264 | 0 | *not_there = 1; |
265 | | /* ah, it's not there or something */ |
266 | 0 | if (default_ttl == 0) { |
267 | 0 | *ttl = LDNS_DEFAULT_TTL; |
268 | 0 | } else { |
269 | 0 | *ttl = default_ttl; |
270 | 0 | } |
271 | 0 | } |
272 | 0 | return LDNS_WIREPARSE_ERR_OK; |
273 | 0 | } |
274 | | |
275 | | /** read class */ |
276 | | static int |
277 | | rrinternal_get_class(sldns_buffer* strbuf, char* token, size_t token_len, |
278 | | int* not_there, uint16_t* cl) |
279 | 0 | { |
280 | | /* if 'not_there' then we got token from previous parse routine */ |
281 | 0 | if(!*not_there) { |
282 | | /* parse new token for class */ |
283 | 0 | if(sldns_bget_token(strbuf, token, "\t\n ", token_len) == -1) { |
284 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_CLASS, |
285 | 0 | sldns_buffer_position(strbuf)); |
286 | 0 | } |
287 | 0 | } else *not_there = 0; |
288 | 0 | *cl = sldns_get_rr_class_by_name(token); |
289 | | /* class can be left out too, assume IN, current token must be type */ |
290 | 0 | if(*cl == 0 && strcmp(token, "CLASS0") != 0) { |
291 | 0 | *not_there = 1; |
292 | 0 | *cl = LDNS_RR_CLASS_IN; |
293 | 0 | } |
294 | 0 | return LDNS_WIREPARSE_ERR_OK; |
295 | 0 | } |
296 | | |
297 | | /** read type */ |
298 | | static int |
299 | | rrinternal_get_type(sldns_buffer* strbuf, char* token, size_t token_len, |
300 | | int* not_there, uint16_t* tp) |
301 | 0 | { |
302 | | /* if 'not_there' then we got token from previous parse routine */ |
303 | 0 | if(!*not_there) { |
304 | | /* parse new token for type */ |
305 | 0 | if(sldns_bget_token(strbuf, token, "\t\n ", token_len) == -1) { |
306 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_TYPE, |
307 | 0 | sldns_buffer_position(strbuf)); |
308 | 0 | } |
309 | 0 | } |
310 | 0 | *tp = sldns_get_rr_type_by_name(token); |
311 | 0 | if(*tp == 0 && strcmp(token, "TYPE0") != 0) { |
312 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_TYPE, |
313 | 0 | sldns_buffer_position(strbuf)); |
314 | 0 | } |
315 | 0 | return LDNS_WIREPARSE_ERR_OK; |
316 | 0 | } |
317 | | |
318 | | /** put type, class, ttl into rr buffer */ |
319 | | static int |
320 | | rrinternal_write_typeclassttl(sldns_buffer* strbuf, uint8_t* rr, size_t len, |
321 | | size_t dname_len, uint16_t tp, uint16_t cl, uint32_t ttl, int question) |
322 | 0 | { |
323 | 0 | if(question) { |
324 | | /* question is : name, type, class */ |
325 | 0 | if(dname_len + 4 > len) |
326 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL, |
327 | 0 | sldns_buffer_position(strbuf)); |
328 | 0 | sldns_write_uint16(rr+dname_len, tp); |
329 | 0 | sldns_write_uint16(rr+dname_len+2, cl); |
330 | 0 | return LDNS_WIREPARSE_ERR_OK; |
331 | 0 | } |
332 | | |
333 | | /* type(2), class(2), ttl(4), rdatalen(2 (later)) = 10 */ |
334 | 0 | if(dname_len + 10 > len) |
335 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL, |
336 | 0 | sldns_buffer_position(strbuf)); |
337 | 0 | sldns_write_uint16(rr+dname_len, tp); |
338 | 0 | sldns_write_uint16(rr+dname_len+2, cl); |
339 | 0 | sldns_write_uint32(rr+dname_len+4, ttl); |
340 | 0 | sldns_write_uint16(rr+dname_len+8, 0); /* rdatalen placeholder */ |
341 | 0 | return LDNS_WIREPARSE_ERR_OK; |
342 | 0 | } |
343 | | |
344 | | /** find delimiters for type */ |
345 | | static const char* |
346 | | rrinternal_get_delims(sldns_rdf_type rdftype, size_t r_cnt, size_t r_max) |
347 | 0 | { |
348 | 0 | switch(rdftype) { |
349 | 0 | case LDNS_RDF_TYPE_B64 : |
350 | 0 | case LDNS_RDF_TYPE_HEX : /* These rdf types may con- */ |
351 | 0 | case LDNS_RDF_TYPE_LOC : /* tain whitespace, only if */ |
352 | 0 | case LDNS_RDF_TYPE_WKS : /* it is the last rd field. */ |
353 | 0 | case LDNS_RDF_TYPE_IPSECKEY : |
354 | 0 | case LDNS_RDF_TYPE_NSEC : if (r_cnt == r_max - 1) { |
355 | 0 | return "\n"; |
356 | 0 | } |
357 | 0 | break; |
358 | 0 | default : break; |
359 | 0 | } |
360 | 0 | return "\n\t "; |
361 | 0 | } |
362 | | |
363 | | /* Syntactic sugar for sldns_rr_new_frm_str_internal */ |
364 | | static int |
365 | | sldns_rdf_type_maybe_quoted(sldns_rdf_type rdf_type) |
366 | 0 | { |
367 | 0 | return rdf_type == LDNS_RDF_TYPE_STR || |
368 | 0 | rdf_type == LDNS_RDF_TYPE_LONG_STR || |
369 | 0 | rdf_type == LDNS_RDF_TYPE_UNQUOTED; |
370 | 0 | } |
371 | | |
372 | | /** see if rdata is quoted */ |
373 | | static int |
374 | | rrinternal_get_quoted(sldns_buffer* strbuf, const char** delimiters, |
375 | | sldns_rdf_type rdftype) |
376 | 0 | { |
377 | 0 | if(sldns_rdf_type_maybe_quoted(rdftype) && |
378 | 0 | sldns_buffer_remaining(strbuf) > 0) { |
379 | | |
380 | | /* skip spaces */ |
381 | 0 | while(sldns_buffer_remaining(strbuf) > 0 && |
382 | 0 | (*(sldns_buffer_current(strbuf)) == ' ' || |
383 | 0 | *(sldns_buffer_current(strbuf)) == '\t')) { |
384 | 0 | sldns_buffer_skip(strbuf, 1); |
385 | 0 | } |
386 | |
|
387 | 0 | if(sldns_buffer_remaining(strbuf) > 0 && |
388 | 0 | *(sldns_buffer_current(strbuf)) == '\"') { |
389 | 0 | *delimiters = "\"\0"; |
390 | 0 | sldns_buffer_skip(strbuf, 1); |
391 | 0 | return 1; |
392 | 0 | } |
393 | 0 | } |
394 | 0 | return 0; |
395 | 0 | } |
396 | | |
397 | | /** spool hex data into rdata */ |
398 | | static int |
399 | | rrinternal_spool_hex(char* token, uint8_t* rr, size_t rr_len, |
400 | | size_t rr_cur_len, size_t* cur_hex_data_size, size_t hex_data_size) |
401 | 0 | { |
402 | 0 | char* p = token; |
403 | 0 | while(*p) { |
404 | 0 | if(isspace((unsigned char)*p)) { |
405 | 0 | p++; |
406 | 0 | continue; |
407 | 0 | } |
408 | 0 | if(!isxdigit((unsigned char)*p)) |
409 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_RDATA, |
410 | 0 | p-token); |
411 | 0 | if(*cur_hex_data_size >= hex_data_size) |
412 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_RDATA, |
413 | 0 | p-token); |
414 | | /* extra robust check */ |
415 | 0 | if(rr_cur_len+(*cur_hex_data_size)/2 >= rr_len) |
416 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL, |
417 | 0 | p-token); |
418 | | /* see if 16s or 1s */ |
419 | 0 | if( ((*cur_hex_data_size)&1) == 0) { |
420 | 0 | rr[rr_cur_len+(*cur_hex_data_size)/2] = |
421 | 0 | (uint8_t)sldns_hexdigit_to_int(*p)*16; |
422 | 0 | } else { |
423 | 0 | rr[rr_cur_len+(*cur_hex_data_size)/2] += |
424 | 0 | (uint8_t)sldns_hexdigit_to_int(*p); |
425 | 0 | } |
426 | 0 | p++; |
427 | 0 | (*cur_hex_data_size)++; |
428 | 0 | } |
429 | 0 | return LDNS_WIREPARSE_ERR_OK; |
430 | 0 | } |
431 | | |
432 | | /** read unknown rr type format */ |
433 | | static int |
434 | | rrinternal_parse_unknown(sldns_buffer* strbuf, char* token, size_t token_len, |
435 | | uint8_t* rr, size_t* rr_len, size_t* rr_cur_len, size_t pre_data_pos) |
436 | 0 | { |
437 | 0 | const char* delim = "\n\t "; |
438 | 0 | size_t hex_data_size, cur_hex_data_size; |
439 | | /* go back to before \# |
440 | | * and skip it while setting delimiters better |
441 | | */ |
442 | 0 | sldns_buffer_set_position(strbuf, pre_data_pos); |
443 | 0 | if(sldns_bget_token(strbuf, token, delim, token_len) == -1) |
444 | 0 | return LDNS_WIREPARSE_ERR_GENERAL; /* should not fail */ |
445 | | /* read rdata octet length */ |
446 | 0 | if(sldns_bget_token(strbuf, token, delim, token_len) == -1) { |
447 | | /* something goes very wrong here */ |
448 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_RDATA, |
449 | 0 | sldns_buffer_position(strbuf)); |
450 | 0 | } |
451 | 0 | hex_data_size = (size_t)atoi(token); |
452 | 0 | if(hex_data_size > LDNS_MAX_RDFLEN || |
453 | 0 | *rr_cur_len + hex_data_size > *rr_len) { |
454 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL, |
455 | 0 | sldns_buffer_position(strbuf)); |
456 | 0 | } |
457 | | /* copy hex chars into hex str (2 chars per byte) */ |
458 | 0 | hex_data_size *= 2; |
459 | 0 | cur_hex_data_size = 0; |
460 | 0 | while(cur_hex_data_size < hex_data_size) { |
461 | 0 | int status; |
462 | 0 | ssize_t c = sldns_bget_token(strbuf, token, delim, token_len); |
463 | 0 | if((status = rrinternal_spool_hex(token, rr, *rr_len, |
464 | 0 | *rr_cur_len, &cur_hex_data_size, hex_data_size)) != 0) |
465 | 0 | return RET_ERR_SHIFT(status, |
466 | 0 | sldns_buffer_position(strbuf)-strlen(token)); |
467 | 0 | if(c == -1) { |
468 | 0 | if(cur_hex_data_size != hex_data_size) |
469 | 0 | return RET_ERR( |
470 | 0 | LDNS_WIREPARSE_ERR_SYNTAX_RDATA, |
471 | 0 | sldns_buffer_position(strbuf)); |
472 | 0 | break; |
473 | 0 | } |
474 | 0 | } |
475 | 0 | *rr_cur_len += hex_data_size/2; |
476 | 0 | return LDNS_WIREPARSE_ERR_OK; |
477 | 0 | } |
478 | | |
479 | | /** parse normal RR rdata element */ |
480 | | static int |
481 | | rrinternal_parse_rdf(sldns_buffer* strbuf, char* token, size_t token_len, |
482 | | uint8_t* rr, size_t rr_len, size_t* rr_cur_len, sldns_rdf_type rdftype, |
483 | | uint16_t rr_type, size_t r_cnt, size_t r_max, size_t dname_len, |
484 | | uint8_t* origin, size_t origin_len) |
485 | 0 | { |
486 | 0 | size_t len; |
487 | 0 | int status; |
488 | |
|
489 | 0 | switch(rdftype) { |
490 | 0 | case LDNS_RDF_TYPE_DNAME: |
491 | | /* check if the origin should be used or concatenated */ |
492 | 0 | if(strcmp(token, "@") == 0) { |
493 | 0 | uint8_t* tocopy; |
494 | 0 | size_t copylen; |
495 | 0 | if(origin) { |
496 | 0 | copylen = origin_len; |
497 | 0 | tocopy = origin; |
498 | 0 | } else if(rr_type == LDNS_RR_TYPE_SOA) { |
499 | 0 | copylen = dname_len; |
500 | 0 | tocopy = rr; /* copy rr owner name */ |
501 | 0 | } else { |
502 | 0 | copylen = 1; |
503 | 0 | tocopy = (uint8_t*)"\0"; |
504 | 0 | } |
505 | 0 | if((*rr_cur_len) + copylen > rr_len) |
506 | 0 | return RET_ERR( |
507 | 0 | LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL, |
508 | 0 | sldns_buffer_position(strbuf)); |
509 | 0 | memmove(rr+*rr_cur_len, tocopy, copylen); |
510 | 0 | (*rr_cur_len) += copylen; |
511 | 0 | } else { |
512 | 0 | size_t dlen = rr_len - (*rr_cur_len); |
513 | 0 | int s = sldns_str2wire_dname_buf_origin(token, |
514 | 0 | rr+*rr_cur_len, &dlen, origin, origin_len); |
515 | 0 | if(s) return RET_ERR_SHIFT(s, |
516 | 0 | sldns_buffer_position(strbuf)-strlen(token)); |
517 | 0 | (*rr_cur_len) += dlen; |
518 | 0 | } |
519 | 0 | return LDNS_WIREPARSE_ERR_OK; |
520 | | |
521 | 0 | case LDNS_RDF_TYPE_HEX: |
522 | 0 | case LDNS_RDF_TYPE_B64: |
523 | | /* When this is the last rdata field, then the |
524 | | * rest should be read in (cause then these |
525 | | * rdf types may contain spaces). */ |
526 | 0 | if(r_cnt == r_max - 1) { |
527 | 0 | size_t tlen = strlen(token); |
528 | 0 | (void)sldns_bget_token(strbuf, token+tlen, "\n", |
529 | 0 | token_len - tlen); |
530 | 0 | } |
531 | 0 | break; |
532 | 0 | default: |
533 | 0 | break; |
534 | 0 | } |
535 | | |
536 | 0 | len = rr_len - (*rr_cur_len); |
537 | 0 | if((status=sldns_str2wire_rdf_buf(token, rr+(*rr_cur_len), &len, |
538 | 0 | rdftype)) != 0) |
539 | 0 | return RET_ERR_SHIFT(status, |
540 | 0 | sldns_buffer_position(strbuf)-strlen(token)); |
541 | 0 | *rr_cur_len += len; |
542 | 0 | return LDNS_WIREPARSE_ERR_OK; |
543 | 0 | } |
544 | | |
545 | | /** |
546 | | * Parse one rdf token. Takes care of quotes and parenthesis. |
547 | | */ |
548 | | static int |
549 | | sldns_parse_rdf_token(sldns_buffer* strbuf, char* token, size_t token_len, |
550 | | int* quoted, int* parens, size_t* pre_data_pos, |
551 | | const char* delimiters, sldns_rdf_type rdftype, size_t* token_strlen) |
552 | 0 | { |
553 | 0 | size_t slen; |
554 | | |
555 | | /* skip spaces and tabs */ |
556 | 0 | while(sldns_buffer_remaining(strbuf) > 0 && !*quoted && |
557 | 0 | (*(sldns_buffer_current(strbuf)) == ' ' || |
558 | 0 | *(sldns_buffer_current(strbuf)) == '\t')) { |
559 | 0 | sldns_buffer_skip(strbuf, 1); |
560 | 0 | } |
561 | |
|
562 | 0 | *pre_data_pos = sldns_buffer_position(strbuf); |
563 | 0 | if(sldns_bget_token_par(strbuf, token, (*quoted)?"\"":delimiters, |
564 | 0 | token_len, parens, (*quoted)?NULL:" \t") == -1) { |
565 | 0 | return 0; |
566 | 0 | } |
567 | 0 | slen = strlen(token); |
568 | | /* check if not quoted yet, and we have encountered quotes */ |
569 | 0 | if(!*quoted && sldns_rdf_type_maybe_quoted(rdftype) && |
570 | 0 | slen >= 2 && |
571 | 0 | (token[0] == '"' || token[0] == '\'') && |
572 | 0 | (token[slen-1] == '"' || token[slen-1] == '\'')) { |
573 | | /* move token two smaller (quotes) with endnull */ |
574 | 0 | memmove(token, token+1, slen-2); |
575 | 0 | token[slen-2] = 0; |
576 | 0 | slen -= 2; |
577 | 0 | *quoted = 1; |
578 | 0 | } else if(!*quoted && sldns_rdf_type_maybe_quoted(rdftype) && |
579 | 0 | slen >= 2 && |
580 | 0 | (token[0] == '"' || token[0] == '\'')) { |
581 | | /* got the start quote (remove it) but read remainder |
582 | | * of quoted string as well into remainder of token */ |
583 | 0 | memmove(token, token+1, slen-1); |
584 | 0 | token[slen-1] = 0; |
585 | 0 | slen -= 1; |
586 | 0 | *quoted = 1; |
587 | | /* rewind buffer over skipped whitespace */ |
588 | 0 | while(sldns_buffer_position(strbuf) > 0 && |
589 | 0 | (sldns_buffer_current(strbuf)[-1] == ' ' || |
590 | 0 | sldns_buffer_current(strbuf)[-1] == '\t')) { |
591 | 0 | sldns_buffer_skip(strbuf, -1); |
592 | 0 | } |
593 | 0 | if(sldns_bget_token_par(strbuf, token+slen, |
594 | 0 | "\"", token_len-slen, |
595 | 0 | parens, NULL) == -1) { |
596 | 0 | return 0; |
597 | 0 | } |
598 | 0 | slen = strlen(token); |
599 | 0 | } |
600 | 0 | *token_strlen = slen; |
601 | 0 | return 1; |
602 | 0 | } |
603 | | |
604 | | /** Add space and one more rdf token onto the existing token string. */ |
605 | | static int |
606 | | sldns_affix_token(sldns_buffer* strbuf, char* token, size_t* token_len, |
607 | | int* quoted, int* parens, size_t* pre_data_pos, |
608 | | const char* delimiters, sldns_rdf_type rdftype, size_t* token_strlen) |
609 | 0 | { |
610 | 0 | size_t addlen = *token_len - *token_strlen; |
611 | 0 | size_t addstrlen = 0; |
612 | | |
613 | | /* add space */ |
614 | | /* when addlen < 2, the token buffer is full considering the NULL byte |
615 | | * from strlen and will lead to buffer overflow with the second |
616 | | * assignment below. */ |
617 | 0 | if(addlen < 2) return 0; |
618 | 0 | token[*token_strlen] = ' '; |
619 | 0 | token[++(*token_strlen)] = 0; |
620 | | |
621 | | /* read another token */ |
622 | 0 | addlen = *token_len - *token_strlen; |
623 | 0 | if(!sldns_parse_rdf_token(strbuf, token+*token_strlen, addlen, quoted, |
624 | 0 | parens, pre_data_pos, delimiters, rdftype, &addstrlen)) |
625 | 0 | return 0; |
626 | 0 | (*token_strlen) += addstrlen; |
627 | 0 | return 1; |
628 | 0 | } |
629 | | |
630 | | static int sldns_str2wire_svcparam_key_cmp(const void *a, const void *b) |
631 | 0 | { |
632 | 0 | return sldns_read_uint16(*(uint8_t**) a) |
633 | 0 | - sldns_read_uint16(*(uint8_t**) b); |
634 | 0 | } |
635 | | |
636 | | /** |
637 | | * Add constraints to the SVCB RRs which involve the whole set |
638 | | */ |
639 | | static int sldns_str2wire_check_svcbparams(uint8_t* rdata, uint16_t rdata_len) |
640 | 0 | { |
641 | 0 | size_t nparams = 0, i; |
642 | 0 | uint8_t new_rdata[LDNS_MAX_RDFLEN]; |
643 | 0 | uint8_t* new_rdata_ptr = new_rdata; |
644 | 0 | uint8_t* svcparams[MAX_NUMBER_OF_SVCPARAMS]; |
645 | 0 | uint8_t* rdata_ptr = rdata; |
646 | 0 | uint16_t rdata_remaining = rdata_len; |
647 | | |
648 | | /* find the SvcParams */ |
649 | 0 | while (rdata_remaining) { |
650 | 0 | uint16_t svcbparam_len; |
651 | |
|
652 | 0 | svcparams[nparams] = rdata_ptr; |
653 | 0 | if (rdata_remaining < 4) |
654 | 0 | return LDNS_WIREPARSE_ERR_SVCPARAM_BROKEN_RDATA; |
655 | 0 | svcbparam_len = sldns_read_uint16(rdata_ptr + 2); |
656 | 0 | rdata_remaining -= 4; |
657 | 0 | rdata_ptr += 4; |
658 | |
|
659 | 0 | if (rdata_remaining < svcbparam_len) |
660 | 0 | return LDNS_WIREPARSE_ERR_SVCPARAM_BROKEN_RDATA; |
661 | 0 | rdata_remaining -= svcbparam_len; |
662 | 0 | rdata_ptr += svcbparam_len; |
663 | |
|
664 | 0 | nparams += 1; |
665 | 0 | if (nparams >= MAX_NUMBER_OF_SVCPARAMS) |
666 | 0 | return LDNS_WIREPARSE_ERR_SVCB_TOO_MANY_PARAMS; |
667 | 0 | } |
668 | | |
669 | | /* In draft-ietf-dnsop-svcb-https-06 Section 7: |
670 | | * |
671 | | * In wire format, the keys are represented by their numeric |
672 | | * values in network byte order, concatenated in ascending order. |
673 | | */ |
674 | 0 | qsort((void *)svcparams |
675 | 0 | ,nparams |
676 | 0 | ,sizeof(uint8_t*) |
677 | 0 | ,sldns_str2wire_svcparam_key_cmp); |
678 | | |
679 | | |
680 | | /* The code below revolves around semantic errors in the SVCParam set. |
681 | | * So long as we do not distinguish between running Unbound as a primary |
682 | | * or as a secondary, we default to secondary behavior and we ignore the |
683 | | * semantic errors. */ |
684 | |
|
685 | | #ifdef SVCB_SEMANTIC_ERRORS |
686 | | { |
687 | | uint8_t* mandatory = NULL; |
688 | | /* In draft-ietf-dnsop-svcb-https-06 Section 7: |
689 | | * |
690 | | * Keys (...) MUST NOT appear more than once. |
691 | | * |
692 | | * If they key has already been seen, we have a duplicate |
693 | | */ |
694 | | for(i=0; i < nparams; i++) { |
695 | | uint16_t key = sldns_read_uint16(svcparams[i]); |
696 | | if(i + 1 < nparams && key == sldns_read_uint16(svcparams[i+1])) |
697 | | return LDNS_WIREPARSE_ERR_SVCB_DUPLICATE_KEYS; |
698 | | if(key == SVCB_KEY_MANDATORY) |
699 | | mandatory = svcparams[i]; |
700 | | } |
701 | | |
702 | | /* Verify that all the SvcParamKeys in mandatory are present */ |
703 | | if(mandatory) { |
704 | | /* Divide by sizeof(uint16_t)*/ |
705 | | uint16_t mandatory_nkeys = sldns_read_uint16(mandatory + 2) / sizeof(uint16_t); |
706 | | |
707 | | /* Guaranteed by sldns_str2wire_svcparam_key_value */ |
708 | | assert(mandatory_nkeys > 0); |
709 | | |
710 | | for(i=0; i < mandatory_nkeys; i++) { |
711 | | uint16_t mandatory_key = sldns_read_uint16( |
712 | | mandatory |
713 | | + 2 * sizeof(uint16_t) |
714 | | + i * sizeof(uint16_t)); |
715 | | uint8_t found = 0; |
716 | | size_t j; |
717 | | |
718 | | for(j=0; j < nparams; j++) { |
719 | | if(mandatory_key == sldns_read_uint16(svcparams[j])) { |
720 | | found = 1; |
721 | | break; |
722 | | } |
723 | | } |
724 | | |
725 | | if(!found) |
726 | | return LDNS_WIREPARSE_ERR_SVCB_MANDATORY_MISSING_PARAM; |
727 | | } |
728 | | } |
729 | | } |
730 | | #endif |
731 | | /* Write rdata in correct order */ |
732 | 0 | for (i = 0; i < nparams; i++) { |
733 | 0 | uint16_t svcparam_len = sldns_read_uint16(svcparams[i] + 2) |
734 | 0 | + 2 * sizeof(uint16_t); |
735 | |
|
736 | 0 | if ((unsigned)(new_rdata_ptr - new_rdata) + svcparam_len > sizeof(new_rdata)) |
737 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
738 | | |
739 | 0 | memcpy(new_rdata_ptr, svcparams[i], svcparam_len); |
740 | 0 | new_rdata_ptr += svcparam_len; |
741 | 0 | } |
742 | 0 | memcpy(rdata, new_rdata, rdata_len); |
743 | 0 | return LDNS_WIREPARSE_ERR_OK; |
744 | 0 | } |
745 | | |
746 | | /** parse rdata from string into rr buffer(-remainder after dname). */ |
747 | | static int |
748 | | rrinternal_parse_rdata(sldns_buffer* strbuf, char* token, size_t token_len, |
749 | | uint8_t* rr, size_t* rr_len, size_t dname_len, uint16_t rr_type, |
750 | | uint8_t* origin, size_t origin_len) |
751 | 0 | { |
752 | 0 | const sldns_rr_descriptor *desc = sldns_rr_descript((uint16_t)rr_type); |
753 | 0 | size_t r_cnt, r_min, r_max; |
754 | 0 | size_t rr_cur_len = dname_len + 10, pre_data_pos, token_strlen; |
755 | 0 | int was_unknown_rr_format = 0, parens = 0, status, quoted; |
756 | 0 | const char* delimiters; |
757 | 0 | sldns_rdf_type rdftype; |
758 | | /* a desc is always returned */ |
759 | 0 | if(!desc) return LDNS_WIREPARSE_ERR_GENERAL; |
760 | 0 | r_max = sldns_rr_descriptor_maximum(desc); |
761 | 0 | r_min = sldns_rr_descriptor_minimum(desc); |
762 | | /* robust check */ |
763 | 0 | if(rr_cur_len > *rr_len) |
764 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL, |
765 | 0 | sldns_buffer_position(strbuf)); |
766 | | |
767 | | /* because number of fields can be variable, we can't rely on |
768 | | * _maximum() only */ |
769 | 0 | for(r_cnt=0; r_cnt < r_max; r_cnt++) { |
770 | 0 | rdftype = sldns_rr_descriptor_field_type(desc, r_cnt); |
771 | 0 | delimiters = rrinternal_get_delims(rdftype, r_cnt, r_max); |
772 | 0 | quoted = rrinternal_get_quoted(strbuf, &delimiters, rdftype); |
773 | |
|
774 | 0 | if(!sldns_parse_rdf_token(strbuf, token, token_len, "ed, |
775 | 0 | &parens, &pre_data_pos, delimiters, rdftype, |
776 | 0 | &token_strlen)) |
777 | 0 | break; |
778 | | |
779 | | /* rfc3597 specifies that any type can be represented |
780 | | * with \# method, which can contain spaces... |
781 | | * it does specify size though... */ |
782 | | |
783 | | /* unknown RR data */ |
784 | 0 | if(token_strlen>=2 && strncmp(token, "\\#", 2) == 0 && |
785 | 0 | !quoted && (token_strlen == 2 || token[2]==' ' || |
786 | 0 | token[2]=='\t')) { |
787 | 0 | was_unknown_rr_format = 1; |
788 | 0 | if((status=rrinternal_parse_unknown(strbuf, token, |
789 | 0 | token_len, rr, rr_len, &rr_cur_len, |
790 | 0 | pre_data_pos)) != 0) |
791 | 0 | return status; |
792 | 0 | } else if(token_strlen > 0 || quoted) { |
793 | 0 | if(rdftype == LDNS_RDF_TYPE_HIP) { |
794 | | /* affix the HIT and PK fields, with a space */ |
795 | 0 | if(!sldns_affix_token(strbuf, token, |
796 | 0 | &token_len, "ed, &parens, |
797 | 0 | &pre_data_pos, delimiters, |
798 | 0 | rdftype, &token_strlen)) |
799 | 0 | break; |
800 | 0 | if(!sldns_affix_token(strbuf, token, |
801 | 0 | &token_len, "ed, &parens, |
802 | 0 | &pre_data_pos, delimiters, |
803 | 0 | rdftype, &token_strlen)) |
804 | 0 | break; |
805 | 0 | } else if(rdftype == LDNS_RDF_TYPE_INT16_DATA && |
806 | 0 | strcmp(token, "0")!=0) { |
807 | | /* affix len and b64 fields */ |
808 | 0 | if(!sldns_affix_token(strbuf, token, |
809 | 0 | &token_len, "ed, &parens, |
810 | 0 | &pre_data_pos, delimiters, |
811 | 0 | rdftype, &token_strlen)) |
812 | 0 | break; |
813 | 0 | } |
814 | | |
815 | | /* normal RR */ |
816 | 0 | if((status=rrinternal_parse_rdf(strbuf, token, |
817 | 0 | token_len, rr, *rr_len, &rr_cur_len, rdftype, |
818 | 0 | rr_type, r_cnt, r_max, dname_len, origin, |
819 | 0 | origin_len)) != 0) { |
820 | 0 | return status; |
821 | 0 | } |
822 | 0 | } |
823 | 0 | } |
824 | 0 | if(!was_unknown_rr_format && r_cnt+1 < r_min) { |
825 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_MISSING_VALUE, |
826 | 0 | sldns_buffer_position(strbuf)); |
827 | 0 | } |
828 | 0 | while(parens != 0) { |
829 | | /* read remainder, must be "" */ |
830 | 0 | if(sldns_bget_token_par(strbuf, token, "\n", token_len, |
831 | 0 | &parens, " \t") == -1) { |
832 | 0 | if(parens != 0) |
833 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_PARENTHESIS, |
834 | 0 | sldns_buffer_position(strbuf)); |
835 | 0 | break; |
836 | 0 | } |
837 | 0 | if(strcmp(token, "") != 0) |
838 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_PARENTHESIS, |
839 | 0 | sldns_buffer_position(strbuf)); |
840 | 0 | } |
841 | | /* write rdata length */ |
842 | 0 | sldns_write_uint16(rr+dname_len+8, (uint16_t)(rr_cur_len-dname_len-10)); |
843 | 0 | *rr_len = rr_cur_len; |
844 | | /* SVCB/HTTPS handling */ |
845 | 0 | if (rr_type == LDNS_RR_TYPE_SVCB || rr_type == LDNS_RR_TYPE_HTTPS) { |
846 | 0 | size_t rdata_len = rr_cur_len - dname_len - 10; |
847 | 0 | uint8_t *rdata = rr+dname_len + 10; |
848 | | |
849 | | /* skip 1st rdata field SvcPriority (uint16_t) */ |
850 | 0 | if (rdata_len < sizeof(uint16_t)) |
851 | 0 | return LDNS_WIREPARSE_ERR_OK; |
852 | | |
853 | 0 | rdata_len -= sizeof(uint16_t); |
854 | 0 | rdata += sizeof(uint16_t); |
855 | | |
856 | | /* skip 2nd rdata field dname */ |
857 | 0 | while (rdata_len && *rdata != 0) { |
858 | 0 | uint8_t label_len; |
859 | |
|
860 | 0 | if ((*rdata & 0xC0)) |
861 | 0 | return LDNS_WIREPARSE_ERR_OK; |
862 | | |
863 | 0 | label_len = *rdata + 1; |
864 | 0 | if (rdata_len < label_len) |
865 | 0 | return LDNS_WIREPARSE_ERR_OK; |
866 | | |
867 | 0 | rdata_len -= label_len; |
868 | 0 | rdata += label_len; |
869 | 0 | } |
870 | | /* The root label is one more character, so smaller |
871 | | * than 1 + 1 means no Svcparam Keys */ |
872 | 0 | if (rdata_len < 2 || *rdata != 0) |
873 | 0 | return LDNS_WIREPARSE_ERR_OK; |
874 | | |
875 | 0 | rdata_len -= 1; |
876 | 0 | rdata += 1; |
877 | 0 | return sldns_str2wire_check_svcbparams(rdata, rdata_len); |
878 | |
|
879 | 0 | } |
880 | 0 | return LDNS_WIREPARSE_ERR_OK; |
881 | 0 | } |
882 | | |
883 | | /* |
884 | | * trailing spaces are allowed |
885 | | * leading spaces are not allowed |
886 | | * allow ttl to be optional |
887 | | * class is optional too |
888 | | * if ttl is missing, and default_ttl is 0, use DEF_TTL |
889 | | * allow ttl to be written as 1d3h |
890 | | * So the RR should look like. e.g. |
891 | | * miek.nl. 3600 IN MX 10 elektron.atoom.net |
892 | | * or |
893 | | * miek.nl. 1h IN MX 10 elektron.atoom.net |
894 | | * or |
895 | | * miek.nl. IN MX 10 elektron.atoom.net |
896 | | */ |
897 | | static int |
898 | | sldns_str2wire_rr_buf_internal(const char* str, uint8_t* rr, size_t* len, |
899 | | size_t* dname_len, uint32_t default_ttl, uint8_t* origin, |
900 | | size_t origin_len, uint8_t* prev, size_t prev_len, int question) |
901 | 0 | { |
902 | 0 | int status; |
903 | 0 | int not_there = 0; |
904 | 0 | char token[LDNS_MAX_RDFLEN+1]; |
905 | 0 | uint32_t ttl = 0; |
906 | 0 | uint16_t tp = 0, cl = 0; |
907 | 0 | size_t ddlen = 0; |
908 | | |
909 | | /* string in buffer */ |
910 | 0 | sldns_buffer strbuf; |
911 | 0 | sldns_buffer_init_frm_data(&strbuf, (uint8_t*)str, strlen(str)); |
912 | 0 | if(!dname_len) dname_len = &ddlen; |
913 | | |
914 | | /* parse the owner */ |
915 | 0 | if((status=rrinternal_get_owner(&strbuf, rr, len, dname_len, origin, |
916 | 0 | origin_len, prev, prev_len, token, sizeof(token))) != 0) |
917 | 0 | return status; |
918 | | |
919 | | /* parse the [ttl] [class] <type> */ |
920 | 0 | if((status=rrinternal_get_ttl(&strbuf, token, sizeof(token), |
921 | 0 | ¬_there, &ttl, default_ttl)) != 0) |
922 | 0 | return status; |
923 | 0 | if((status=rrinternal_get_class(&strbuf, token, sizeof(token), |
924 | 0 | ¬_there, &cl)) != 0) |
925 | 0 | return status; |
926 | 0 | if((status=rrinternal_get_type(&strbuf, token, sizeof(token), |
927 | 0 | ¬_there, &tp)) != 0) |
928 | 0 | return status; |
929 | | /* put ttl, class, type into the rr result */ |
930 | 0 | if((status=rrinternal_write_typeclassttl(&strbuf, rr, *len, *dname_len, tp, cl, |
931 | 0 | ttl, question)) != 0) |
932 | 0 | return status; |
933 | | /* for a question-RR we are done, no rdata */ |
934 | 0 | if(question) { |
935 | 0 | *len = *dname_len + 4; |
936 | 0 | return LDNS_WIREPARSE_ERR_OK; |
937 | 0 | } |
938 | | |
939 | | /* rdata */ |
940 | 0 | if((status=rrinternal_parse_rdata(&strbuf, token, sizeof(token), |
941 | 0 | rr, len, *dname_len, tp, origin, origin_len)) != 0) |
942 | 0 | return status; |
943 | | |
944 | 0 | return LDNS_WIREPARSE_ERR_OK; |
945 | 0 | } |
946 | | |
947 | | int sldns_str2wire_rr_buf(const char* str, uint8_t* rr, size_t* len, |
948 | | size_t* dname_len, uint32_t default_ttl, uint8_t* origin, |
949 | | size_t origin_len, uint8_t* prev, size_t prev_len) |
950 | 0 | { |
951 | 0 | return sldns_str2wire_rr_buf_internal(str, rr, len, dname_len, |
952 | 0 | default_ttl, origin, origin_len, prev, prev_len, 0); |
953 | 0 | } |
954 | | |
955 | | int sldns_str2wire_rr_question_buf(const char* str, uint8_t* rr, size_t* len, |
956 | | size_t* dname_len, uint8_t* origin, size_t origin_len, uint8_t* prev, |
957 | | size_t prev_len) |
958 | 0 | { |
959 | 0 | return sldns_str2wire_rr_buf_internal(str, rr, len, dname_len, |
960 | 0 | 0, origin, origin_len, prev, prev_len, 1); |
961 | 0 | } |
962 | | |
963 | | uint16_t sldns_wirerr_get_type(uint8_t* rr, size_t len, size_t dname_len) |
964 | 0 | { |
965 | 0 | if(len < dname_len+2) |
966 | 0 | return 0; |
967 | 0 | return sldns_read_uint16(rr+dname_len); |
968 | 0 | } |
969 | | |
970 | | uint16_t sldns_wirerr_get_class(uint8_t* rr, size_t len, size_t dname_len) |
971 | 0 | { |
972 | 0 | if(len < dname_len+4) |
973 | 0 | return 0; |
974 | 0 | return sldns_read_uint16(rr+dname_len+2); |
975 | 0 | } |
976 | | |
977 | | uint32_t sldns_wirerr_get_ttl(uint8_t* rr, size_t len, size_t dname_len) |
978 | 0 | { |
979 | 0 | if(len < dname_len+8) |
980 | 0 | return 0; |
981 | 0 | return sldns_read_uint32(rr+dname_len+4); |
982 | 0 | } |
983 | | |
984 | | uint16_t sldns_wirerr_get_rdatalen(uint8_t* rr, size_t len, size_t dname_len) |
985 | 0 | { |
986 | 0 | if(len < dname_len+10) |
987 | 0 | return 0; |
988 | 0 | return sldns_read_uint16(rr+dname_len+8); |
989 | 0 | } |
990 | | |
991 | | uint8_t* sldns_wirerr_get_rdata(uint8_t* rr, size_t len, size_t dname_len) |
992 | 0 | { |
993 | 0 | if(len < dname_len+10) |
994 | 0 | return NULL; |
995 | 0 | return rr+dname_len+10; |
996 | 0 | } |
997 | | |
998 | | uint8_t* sldns_wirerr_get_rdatawl(uint8_t* rr, size_t len, size_t dname_len) |
999 | 0 | { |
1000 | 0 | if(len < dname_len+10) |
1001 | 0 | return NULL; |
1002 | 0 | return rr+dname_len+8; |
1003 | 0 | } |
1004 | | |
1005 | | const char* sldns_get_errorstr_parse(int e) |
1006 | 0 | { |
1007 | 0 | sldns_lookup_table *lt; |
1008 | 0 | lt = sldns_lookup_by_id(sldns_wireparse_errors, LDNS_WIREPARSE_ERROR(e)); |
1009 | 0 | return lt?lt->name:"unknown error"; |
1010 | 0 | } |
1011 | | |
1012 | | /* Strip whitespace from the start and the end of <line>. */ |
1013 | | char * |
1014 | | sldns_strip_ws(char *line) |
1015 | 0 | { |
1016 | 0 | char *s = line, *e; |
1017 | |
|
1018 | 0 | for (s = line; *s && isspace((unsigned char)*s); s++) |
1019 | 0 | ; |
1020 | 0 | for (e = strchr(s, 0); e > s+2 && isspace((unsigned char)e[-1]) && e[-2] != '\\'; e--) |
1021 | 0 | ; |
1022 | 0 | *e = 0; |
1023 | 0 | return s; |
1024 | 0 | } |
1025 | | |
1026 | | int sldns_fp2wire_rr_buf(FILE* in, uint8_t* rr, size_t* len, size_t* dname_len, |
1027 | | struct sldns_file_parse_state* parse_state) |
1028 | 0 | { |
1029 | 0 | char line[LDNS_RR_BUF_SIZE+1]; |
1030 | 0 | ssize_t size; |
1031 | | |
1032 | | /* read an entire line in from the file */ |
1033 | 0 | if((size = sldns_fget_token_l(in, line, LDNS_PARSE_SKIP_SPACE, |
1034 | 0 | LDNS_RR_BUF_SIZE, parse_state?&parse_state->lineno:NULL)) |
1035 | 0 | == -1) { |
1036 | | /* if last line was empty, we are now at feof, which is not |
1037 | | * always a parse error (happens when for instance last line |
1038 | | * was a comment) |
1039 | | */ |
1040 | 0 | return LDNS_WIREPARSE_ERR_SYNTAX; |
1041 | 0 | } |
1042 | | |
1043 | | /* we can have the situation, where we've read ok, but still got |
1044 | | * no bytes to play with, in this case size is 0 */ |
1045 | 0 | if(size == 0) { |
1046 | 0 | if(*len > 0) |
1047 | 0 | rr[0] = 0; |
1048 | 0 | *len = 0; |
1049 | 0 | *dname_len = 0; |
1050 | 0 | return LDNS_WIREPARSE_ERR_OK; |
1051 | 0 | } |
1052 | | |
1053 | 0 | if(strncmp(line, "$ORIGIN", 7) == 0 && isspace((unsigned char)line[7])) { |
1054 | 0 | int s; |
1055 | 0 | strlcpy((char*)rr, line, *len); |
1056 | 0 | *len = 0; |
1057 | 0 | *dname_len = 0; |
1058 | 0 | if(!parse_state) return LDNS_WIREPARSE_ERR_OK; |
1059 | 0 | parse_state->origin_len = sizeof(parse_state->origin); |
1060 | 0 | s = sldns_str2wire_dname_buf(sldns_strip_ws(line+8), |
1061 | 0 | parse_state->origin, &parse_state->origin_len); |
1062 | 0 | if(s) parse_state->origin_len = 0; |
1063 | 0 | return s; |
1064 | 0 | } else if(strncmp(line, "$TTL", 4) == 0 && isspace((unsigned char)line[4])) { |
1065 | 0 | const char* end = NULL; |
1066 | 0 | int overflow = 0; |
1067 | 0 | strlcpy((char*)rr, line, *len); |
1068 | 0 | *len = 0; |
1069 | 0 | *dname_len = 0; |
1070 | 0 | if(!parse_state) return LDNS_WIREPARSE_ERR_OK; |
1071 | 0 | parse_state->default_ttl = sldns_str2period( |
1072 | 0 | sldns_strip_ws(line+5), &end, &overflow); |
1073 | 0 | if(overflow) |
1074 | 0 | return LDNS_WIREPARSE_ERR_SYNTAX_INTEGER_OVERFLOW; |
1075 | 0 | } else if (strncmp(line, "$INCLUDE", 8) == 0) { |
1076 | 0 | strlcpy((char*)rr, line, *len); |
1077 | 0 | *len = 0; |
1078 | 0 | *dname_len = 0; |
1079 | 0 | return LDNS_WIREPARSE_ERR_INCLUDE; |
1080 | 0 | } else if (strncmp(line, "$", 1) == 0) { |
1081 | 0 | strlcpy((char*)rr, line, *len); |
1082 | 0 | *len = 0; |
1083 | 0 | *dname_len = 0; |
1084 | 0 | return LDNS_WIREPARSE_ERR_INCLUDE; |
1085 | 0 | } else { |
1086 | 0 | int r = sldns_str2wire_rr_buf(line, rr, len, dname_len, |
1087 | 0 | parse_state?parse_state->default_ttl:0, |
1088 | 0 | (parse_state&&parse_state->origin_len)? |
1089 | 0 | parse_state->origin:NULL, |
1090 | 0 | parse_state?parse_state->origin_len:0, |
1091 | 0 | (parse_state&&parse_state->prev_rr_len)? |
1092 | 0 | parse_state->prev_rr:NULL, |
1093 | 0 | parse_state?parse_state->prev_rr_len:0); |
1094 | 0 | if(r == LDNS_WIREPARSE_ERR_OK && (*dname_len) != 0 && |
1095 | 0 | parse_state && |
1096 | 0 | (*dname_len) <= sizeof(parse_state->prev_rr)) { |
1097 | 0 | memmove(parse_state->prev_rr, rr, *dname_len); |
1098 | 0 | parse_state->prev_rr_len = (*dname_len); |
1099 | 0 | } |
1100 | 0 | if(r == LDNS_WIREPARSE_ERR_OK && parse_state) { |
1101 | 0 | parse_state->default_ttl = sldns_wirerr_get_ttl( |
1102 | 0 | rr, *len, *dname_len); |
1103 | 0 | } |
1104 | 0 | return r; |
1105 | 0 | } |
1106 | 0 | return LDNS_WIREPARSE_ERR_OK; |
1107 | 0 | } |
1108 | | |
1109 | | static int |
1110 | | sldns_str2wire_svcparam_key_lookup(const char *key, size_t key_len) |
1111 | 0 | { |
1112 | 0 | char buf[64]; |
1113 | 0 | char *endptr; |
1114 | 0 | unsigned long int key_value; |
1115 | |
|
1116 | 0 | if (key_len >= 4 && key_len <= 8 && !strncmp(key, "key", 3)) { |
1117 | 0 | memcpy(buf, key + 3, key_len - 3); |
1118 | 0 | buf[key_len - 3] = 0; |
1119 | 0 | key_value = strtoul(buf, &endptr, 10); |
1120 | |
|
1121 | 0 | if (endptr > buf /* digits seen */ |
1122 | 0 | && *endptr == 0 /* no non-digit chars after digits */ |
1123 | 0 | && key_value <= 65535) /* no overflow */ |
1124 | 0 | return key_value; |
1125 | |
|
1126 | 0 | } else switch (key_len) { |
1127 | 0 | case 3: |
1128 | 0 | if (!strncmp(key, "ech", key_len)) |
1129 | 0 | return SVCB_KEY_ECH; |
1130 | 0 | break; |
1131 | | |
1132 | 0 | case 4: |
1133 | 0 | if (!strncmp(key, "alpn", key_len)) |
1134 | 0 | return SVCB_KEY_ALPN; |
1135 | 0 | if (!strncmp(key, "port", key_len)) |
1136 | 0 | return SVCB_KEY_PORT; |
1137 | 0 | break; |
1138 | | |
1139 | 0 | case 7: |
1140 | 0 | if (!strncmp(key, "dohpath", key_len)) |
1141 | 0 | return SVCB_KEY_DOHPATH; |
1142 | 0 | break; |
1143 | | |
1144 | 0 | case 8: |
1145 | 0 | if (!strncmp(key, "ipv4hint", key_len)) |
1146 | 0 | return SVCB_KEY_IPV4HINT; |
1147 | 0 | if (!strncmp(key, "ipv6hint", key_len)) |
1148 | 0 | return SVCB_KEY_IPV6HINT; |
1149 | 0 | break; |
1150 | | |
1151 | 0 | case 9: |
1152 | 0 | if (!strncmp(key, "mandatory", key_len)) |
1153 | 0 | return SVCB_KEY_MANDATORY; |
1154 | 0 | if (!strncmp(key, "echconfig", key_len)) |
1155 | 0 | return SVCB_KEY_ECH; /* allow "echconfig" as well as "ech" */ |
1156 | 0 | break; |
1157 | | |
1158 | 0 | case 15: |
1159 | 0 | if (!strncmp(key, "no-default-alpn", key_len)) |
1160 | 0 | return SVCB_KEY_NO_DEFAULT_ALPN; |
1161 | 0 | break; |
1162 | | |
1163 | 0 | default: |
1164 | 0 | break; |
1165 | 0 | } |
1166 | | |
1167 | | /* Although the returned value might be used by the caller, |
1168 | | * the parser has erred, so the zone will not be loaded. |
1169 | | */ |
1170 | 0 | return -1; |
1171 | 0 | } |
1172 | | |
1173 | | static int |
1174 | | sldns_str2wire_svcparam_port(const char* val, uint8_t* rd, size_t* rd_len) |
1175 | 0 | { |
1176 | 0 | unsigned long int port; |
1177 | 0 | char *endptr; |
1178 | |
|
1179 | 0 | if (*rd_len < 6) |
1180 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
1181 | | |
1182 | 0 | port = strtoul(val, &endptr, 10); |
1183 | |
|
1184 | 0 | if (endptr > val /* digits seen */ |
1185 | 0 | && *endptr == 0 /* no non-digit chars after digits */ |
1186 | 0 | && port <= 65535) { /* no overflow */ |
1187 | |
|
1188 | 0 | sldns_write_uint16(rd, SVCB_KEY_PORT); |
1189 | 0 | sldns_write_uint16(rd + 2, sizeof(uint16_t)); |
1190 | 0 | sldns_write_uint16(rd + 4, port); |
1191 | 0 | *rd_len = 6; |
1192 | |
|
1193 | 0 | return LDNS_WIREPARSE_ERR_OK; |
1194 | 0 | } |
1195 | | |
1196 | 0 | return LDNS_WIREPARSE_ERR_SVCB_PORT_VALUE_SYNTAX; |
1197 | 0 | } |
1198 | | |
1199 | | static int |
1200 | | sldns_str2wire_svcbparam_ipv4hint(const char* val, uint8_t* rd, size_t* rd_len) |
1201 | 0 | { |
1202 | 0 | size_t count; |
1203 | 0 | char ip_str[INET_ADDRSTRLEN+1]; |
1204 | 0 | char *next_ip_str; |
1205 | 0 | size_t i; |
1206 | |
|
1207 | 0 | for (i = 0, count = 1; val[i]; i++) { |
1208 | 0 | if (val[i] == ',') |
1209 | 0 | count += 1; |
1210 | 0 | if (count > SVCB_MAX_COMMA_SEPARATED_VALUES) { |
1211 | 0 | return LDNS_WIREPARSE_ERR_SVCB_IPV4_TOO_MANY_ADDRESSES; |
1212 | 0 | } |
1213 | 0 | } |
1214 | | |
1215 | 0 | if (*rd_len < (LDNS_IP4ADDRLEN * count) + 4) |
1216 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
1217 | | |
1218 | | /* count is number of comma's in val + 1; so the actual number of IPv4 |
1219 | | * addresses in val |
1220 | | */ |
1221 | 0 | sldns_write_uint16(rd, SVCB_KEY_IPV4HINT); |
1222 | 0 | sldns_write_uint16(rd + 2, LDNS_IP4ADDRLEN * count); |
1223 | 0 | *rd_len = 4; |
1224 | |
|
1225 | 0 | while (count) { |
1226 | 0 | if (!(next_ip_str = strchr(val, ','))) { |
1227 | 0 | if (inet_pton(AF_INET, val, rd + *rd_len) != 1) |
1228 | 0 | break; |
1229 | 0 | *rd_len += LDNS_IP4ADDRLEN; |
1230 | |
|
1231 | 0 | assert(count == 1); |
1232 | |
|
1233 | 0 | } else if (next_ip_str - val >= (int)sizeof(ip_str)) |
1234 | 0 | break; |
1235 | | |
1236 | 0 | else { |
1237 | 0 | memcpy(ip_str, val, next_ip_str - val); |
1238 | 0 | ip_str[next_ip_str - val] = 0; |
1239 | 0 | if (inet_pton(AF_INET, ip_str, rd + *rd_len) != 1) { |
1240 | 0 | break; |
1241 | 0 | } |
1242 | 0 | *rd_len += LDNS_IP4ADDRLEN; |
1243 | |
|
1244 | 0 | val = next_ip_str + 1; |
1245 | 0 | } |
1246 | 0 | count--; |
1247 | 0 | } |
1248 | 0 | if (count) /* verify that we parsed all values */ |
1249 | 0 | return LDNS_WIREPARSE_ERR_SYNTAX_IP4; |
1250 | | |
1251 | 0 | return LDNS_WIREPARSE_ERR_OK; |
1252 | 0 | } |
1253 | | |
1254 | | static int |
1255 | | sldns_str2wire_svcbparam_ipv6hint(const char* val, uint8_t* rd, size_t* rd_len) |
1256 | 0 | { |
1257 | 0 | size_t count; |
1258 | 0 | char ip_str[INET6_ADDRSTRLEN+1]; |
1259 | 0 | char *next_ip_str; |
1260 | 0 | size_t i; |
1261 | |
|
1262 | 0 | for (i = 0, count = 1; val[i]; i++) { |
1263 | 0 | if (val[i] == ',') |
1264 | 0 | count += 1; |
1265 | 0 | if (count > SVCB_MAX_COMMA_SEPARATED_VALUES) { |
1266 | 0 | return LDNS_WIREPARSE_ERR_SVCB_IPV6_TOO_MANY_ADDRESSES; |
1267 | 0 | } |
1268 | 0 | } |
1269 | | |
1270 | 0 | if (*rd_len < (LDNS_IP6ADDRLEN * count) + 4) |
1271 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
1272 | | |
1273 | | /* count is number of comma's in val + 1; so the actual number of IPv6 |
1274 | | * addresses in val |
1275 | | */ |
1276 | 0 | sldns_write_uint16(rd, SVCB_KEY_IPV6HINT); |
1277 | 0 | sldns_write_uint16(rd + 2, LDNS_IP6ADDRLEN * count); |
1278 | 0 | *rd_len = 4; |
1279 | |
|
1280 | 0 | while (count) { |
1281 | 0 | if (!(next_ip_str = strchr(val, ','))) { |
1282 | 0 | if (inet_pton(AF_INET6, val, rd + *rd_len) != 1) |
1283 | 0 | break; |
1284 | 0 | *rd_len += LDNS_IP6ADDRLEN; |
1285 | |
|
1286 | 0 | assert(count == 1); |
1287 | |
|
1288 | 0 | } else if (next_ip_str - val >= (int)sizeof(ip_str)) |
1289 | 0 | break; |
1290 | | |
1291 | 0 | else { |
1292 | 0 | memcpy(ip_str, val, next_ip_str - val); |
1293 | 0 | ip_str[next_ip_str - val] = 0; |
1294 | 0 | if (inet_pton(AF_INET6, ip_str, rd + *rd_len) != 1) { |
1295 | 0 | break; |
1296 | 0 | } |
1297 | 0 | *rd_len += LDNS_IP6ADDRLEN; |
1298 | |
|
1299 | 0 | val = next_ip_str + 1; |
1300 | 0 | } |
1301 | 0 | count--; |
1302 | 0 | } |
1303 | 0 | if (count) /* verify that we parsed all values */ |
1304 | 0 | return LDNS_WIREPARSE_ERR_SYNTAX_IP6; |
1305 | | |
1306 | 0 | return LDNS_WIREPARSE_ERR_OK; |
1307 | 0 | } |
1308 | | |
1309 | | /* compare function used for sorting uint16_t's */ |
1310 | | static int |
1311 | | sldns_network_uint16_cmp(const void *a, const void *b) |
1312 | 0 | { |
1313 | 0 | return ((int)sldns_read_uint16(a)) - ((int)sldns_read_uint16(b)); |
1314 | 0 | } |
1315 | | |
1316 | | static int |
1317 | | sldns_str2wire_svcbparam_mandatory(const char* val, uint8_t* rd, size_t* rd_len) |
1318 | 0 | { |
1319 | 0 | size_t i, count, val_len; |
1320 | 0 | char* next_key; |
1321 | |
|
1322 | 0 | val_len = strlen(val); |
1323 | |
|
1324 | 0 | for (i = 0, count = 1; val[i]; i++) { |
1325 | 0 | if (val[i] == ',') |
1326 | 0 | count += 1; |
1327 | 0 | if (count > SVCB_MAX_COMMA_SEPARATED_VALUES) { |
1328 | 0 | return LDNS_WIREPARSE_ERR_SVCB_MANDATORY_TOO_MANY_KEYS; |
1329 | 0 | } |
1330 | 0 | } |
1331 | 0 | if (sizeof(uint16_t) * (count + 2) > *rd_len) |
1332 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
1333 | | |
1334 | 0 | sldns_write_uint16(rd, SVCB_KEY_MANDATORY); |
1335 | 0 | sldns_write_uint16(rd + 2, sizeof(uint16_t) * count); |
1336 | 0 | *rd_len = 4; |
1337 | |
|
1338 | 0 | while (1) { |
1339 | 0 | int svcparamkey; |
1340 | |
|
1341 | 0 | if (!(next_key = strchr(val, ','))) { |
1342 | 0 | svcparamkey = sldns_str2wire_svcparam_key_lookup(val, val_len); |
1343 | |
|
1344 | 0 | if (svcparamkey < 0) { |
1345 | 0 | return LDNS_WIREPARSE_ERR_SVCB_UNKNOWN_KEY; |
1346 | 0 | } |
1347 | | |
1348 | 0 | sldns_write_uint16(rd + *rd_len, svcparamkey); |
1349 | 0 | *rd_len += 2; |
1350 | 0 | break; |
1351 | 0 | } else { |
1352 | 0 | svcparamkey = sldns_str2wire_svcparam_key_lookup(val, next_key - val); |
1353 | |
|
1354 | 0 | if (svcparamkey < 0) { |
1355 | 0 | return LDNS_WIREPARSE_ERR_SVCB_UNKNOWN_KEY; |
1356 | 0 | } |
1357 | | |
1358 | 0 | sldns_write_uint16(rd + *rd_len, |
1359 | 0 | svcparamkey); |
1360 | 0 | *rd_len += 2; |
1361 | 0 | } |
1362 | | |
1363 | 0 | val_len -= next_key - val + 1; |
1364 | 0 | val = next_key + 1; /* skip the comma */ |
1365 | 0 | } |
1366 | | |
1367 | | /* In draft-ietf-dnsop-svcb-https-06 Section 7: |
1368 | | * |
1369 | | * "In wire format, the keys are represented by their numeric |
1370 | | * values in network byte order, concatenated in ascending order." |
1371 | | */ |
1372 | 0 | qsort((void *)(rd + 4), count, sizeof(uint16_t), sldns_network_uint16_cmp); |
1373 | | |
1374 | | /* The code below revolves around semantic errors in the SVCParam set. |
1375 | | * So long as we do not distinguish between running Unbound as a primary |
1376 | | * or as a secondary, we default to secondary behavior and we ignore the |
1377 | | * semantic errors. */ |
1378 | | #ifdef SVCB_SEMANTIC_ERRORS |
1379 | | /* In draft-ietf-dnsop-svcb-https-06 Section 8 |
1380 | | * automatically mandatory MUST NOT appear in its own value-list |
1381 | | */ |
1382 | | if (sldns_read_uint16(rd + 4) == SVCB_KEY_MANDATORY) |
1383 | | return LDNS_WIREPARSE_ERR_SVCB_MANDATORY_IN_MANDATORY; |
1384 | | |
1385 | | /* Guarantee key uniqueness. After the sort we only need to |
1386 | | * compare neighbouring keys */ |
1387 | | if (count > 1) { |
1388 | | for (i = 0; i < count - 1; i++) { |
1389 | | uint8_t* current_pos = (rd + 4 + (sizeof(uint16_t) * i)); |
1390 | | uint16_t key = sldns_read_uint16(current_pos); |
1391 | | |
1392 | | if (key == sldns_read_uint16(current_pos + 2)) { |
1393 | | return LDNS_WIREPARSE_ERR_SVCB_MANDATORY_DUPLICATE_KEY; |
1394 | | } |
1395 | | } |
1396 | | } |
1397 | | #endif |
1398 | 0 | return LDNS_WIREPARSE_ERR_OK; |
1399 | 0 | } |
1400 | | |
1401 | | static int |
1402 | | sldns_str2wire_svcbparam_ech_value(const char* val, uint8_t* rd, size_t* rd_len) |
1403 | 0 | { |
1404 | 0 | uint8_t buffer[LDNS_MAX_RDFLEN]; |
1405 | 0 | int wire_len; |
1406 | | |
1407 | | /* single 0 represents empty buffer */ |
1408 | 0 | if(strcmp(val, "0") == 0) { |
1409 | 0 | if (*rd_len < 4) |
1410 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
1411 | 0 | sldns_write_uint16(rd, SVCB_KEY_ECH); |
1412 | 0 | sldns_write_uint16(rd + 2, 0); |
1413 | |
|
1414 | 0 | return LDNS_WIREPARSE_ERR_OK; |
1415 | 0 | } |
1416 | | |
1417 | 0 | wire_len = sldns_b64_pton(val, buffer, LDNS_MAX_RDFLEN); |
1418 | |
|
1419 | 0 | if (wire_len <= 0) { |
1420 | 0 | return LDNS_WIREPARSE_ERR_SYNTAX_B64; |
1421 | 0 | } else if ((unsigned)wire_len + 4 > *rd_len) { |
1422 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
1423 | 0 | } else { |
1424 | 0 | sldns_write_uint16(rd, SVCB_KEY_ECH); |
1425 | 0 | sldns_write_uint16(rd + 2, wire_len); |
1426 | 0 | memcpy(rd + 4, buffer, wire_len); |
1427 | 0 | *rd_len = 4 + wire_len; |
1428 | |
|
1429 | 0 | return LDNS_WIREPARSE_ERR_OK; |
1430 | 0 | } |
1431 | 0 | } |
1432 | | |
1433 | | static const char* |
1434 | | sldns_str2wire_svcbparam_parse_next_unescaped_comma(const char *val) |
1435 | 0 | { |
1436 | 0 | while (*val) { |
1437 | | /* Only return when the comma is not escaped*/ |
1438 | 0 | if (*val == '\\'){ |
1439 | 0 | ++val; |
1440 | 0 | if (!*val) |
1441 | 0 | break; |
1442 | 0 | } else if (*val == ',') |
1443 | 0 | return val; |
1444 | | |
1445 | 0 | val++; |
1446 | 0 | } |
1447 | 0 | return NULL; |
1448 | 0 | } |
1449 | | |
1450 | | /* The source is already properly unescaped, this double unescaping is purely to allow for |
1451 | | * comma's in comma separated alpn lists. |
1452 | | * |
1453 | | * In draft-ietf-dnsop-svcb-https-06 Section 7: |
1454 | | * To enable simpler parsing, this SvcParamValue MUST NOT contain escape sequences. |
1455 | | */ |
1456 | | static size_t |
1457 | | sldns_str2wire_svcbparam_parse_copy_unescaped(uint8_t *dst, |
1458 | | const char *src, size_t len) |
1459 | 0 | { |
1460 | 0 | uint8_t *orig_dst = dst; |
1461 | |
|
1462 | 0 | while (len) { |
1463 | 0 | if (*src == '\\') { |
1464 | 0 | src++; |
1465 | 0 | len--; |
1466 | 0 | if (!len) |
1467 | 0 | break; |
1468 | 0 | } |
1469 | 0 | *dst++ = *src++; |
1470 | 0 | len--; |
1471 | 0 | } |
1472 | 0 | return (size_t)(dst - orig_dst); |
1473 | 0 | } |
1474 | | |
1475 | | static int |
1476 | | sldns_str2wire_svcbparam_alpn_value(const char* val, |
1477 | | uint8_t* rd, size_t* rd_len) |
1478 | 0 | { |
1479 | 0 | uint8_t unescaped_dst[LDNS_MAX_RDFLEN]; |
1480 | 0 | uint8_t *dst = unescaped_dst; |
1481 | 0 | const char *next_str; |
1482 | 0 | size_t str_len; |
1483 | 0 | size_t dst_len; |
1484 | 0 | size_t val_len; |
1485 | |
|
1486 | 0 | val_len = strlen(val); |
1487 | |
|
1488 | 0 | if (val_len > sizeof(unescaped_dst)) { |
1489 | 0 | return LDNS_WIREPARSE_ERR_SVCB_ALPN_KEY_TOO_LARGE; |
1490 | 0 | } |
1491 | 0 | while (val_len) { |
1492 | 0 | size_t key_len; |
1493 | |
|
1494 | 0 | str_len = (next_str = sldns_str2wire_svcbparam_parse_next_unescaped_comma(val)) |
1495 | 0 | ? (size_t)(next_str - val) : val_len; |
1496 | |
|
1497 | 0 | if (str_len > 255) { |
1498 | 0 | return LDNS_WIREPARSE_ERR_SVCB_ALPN_KEY_TOO_LARGE; |
1499 | 0 | } |
1500 | | |
1501 | 0 | key_len = sldns_str2wire_svcbparam_parse_copy_unescaped(dst + 1, val, str_len); |
1502 | 0 | *dst++ = key_len; |
1503 | 0 | dst += key_len; |
1504 | |
|
1505 | 0 | if (!next_str) |
1506 | 0 | break; |
1507 | | |
1508 | | /* skip the comma in the next iteration */ |
1509 | 0 | val_len -= next_str - val + 1; |
1510 | 0 | val = next_str + 1; |
1511 | 0 | } |
1512 | 0 | dst_len = dst - unescaped_dst; |
1513 | 0 | if (*rd_len < 4 + dst_len) |
1514 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
1515 | 0 | sldns_write_uint16(rd, SVCB_KEY_ALPN); |
1516 | 0 | sldns_write_uint16(rd + 2, dst_len); |
1517 | 0 | memcpy(rd + 4, unescaped_dst, dst_len); |
1518 | 0 | *rd_len = 4 + dst_len; |
1519 | |
|
1520 | 0 | return LDNS_WIREPARSE_ERR_OK; |
1521 | 0 | } |
1522 | | |
1523 | | static int |
1524 | | sldns_str2wire_svcbparam_dohpath_value(const char* val, |
1525 | | uint8_t* rd, size_t* rd_len) |
1526 | 0 | { |
1527 | 0 | size_t val_len; |
1528 | | |
1529 | | /* RFC6570#section-2.1 |
1530 | | * "The characters outside of expressions in a URI Template string are |
1531 | | * intended to be copied literally" |
1532 | | * Practically this means we do not have to look for "double escapes" |
1533 | | * like in the alpn value list. |
1534 | | */ |
1535 | |
|
1536 | 0 | val_len = strlen(val); |
1537 | |
|
1538 | 0 | if (*rd_len < 4 + val_len) { |
1539 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
1540 | 0 | } |
1541 | | |
1542 | 0 | sldns_write_uint16(rd, SVCB_KEY_DOHPATH); |
1543 | 0 | sldns_write_uint16(rd + 2, val_len); |
1544 | 0 | memcpy(rd + 4, val, val_len); |
1545 | 0 | *rd_len = 4 + val_len; |
1546 | |
|
1547 | 0 | return LDNS_WIREPARSE_ERR_OK; |
1548 | 0 | } |
1549 | | |
1550 | | static int |
1551 | | sldns_str2wire_svcparam_value(const char *key, size_t key_len, |
1552 | | const char *val, uint8_t* rd, size_t* rd_len) |
1553 | 0 | { |
1554 | 0 | size_t str_len; |
1555 | 0 | int svcparamkey = sldns_str2wire_svcparam_key_lookup(key, key_len); |
1556 | |
|
1557 | 0 | if (svcparamkey < 0) { |
1558 | 0 | return LDNS_WIREPARSE_ERR_SVCB_UNKNOWN_KEY; |
1559 | 0 | } |
1560 | | |
1561 | | /* key without value */ |
1562 | 0 | if (val == NULL) { |
1563 | 0 | switch (svcparamkey) { |
1564 | | #ifdef SVCB_SEMANTIC_ERRORS |
1565 | | case SVCB_KEY_MANDATORY: |
1566 | | case SVCB_KEY_ALPN: |
1567 | | case SVCB_KEY_PORT: |
1568 | | case SVCB_KEY_IPV4HINT: |
1569 | | case SVCB_KEY_IPV6HINT: |
1570 | | case SVCB_KEY_DOHPATH: |
1571 | | return LDNS_WIREPARSE_ERR_SVCB_MISSING_PARAM; |
1572 | | #endif |
1573 | 0 | default: |
1574 | 0 | if (*rd_len < 4) |
1575 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
1576 | 0 | sldns_write_uint16(rd, svcparamkey); |
1577 | 0 | sldns_write_uint16(rd + 2, 0); |
1578 | 0 | *rd_len = 4; |
1579 | |
|
1580 | 0 | return LDNS_WIREPARSE_ERR_OK; |
1581 | 0 | } |
1582 | 0 | } |
1583 | | |
1584 | | /* value is non-empty */ |
1585 | 0 | switch (svcparamkey) { |
1586 | 0 | case SVCB_KEY_PORT: |
1587 | 0 | return sldns_str2wire_svcparam_port(val, rd, rd_len); |
1588 | 0 | case SVCB_KEY_IPV4HINT: |
1589 | 0 | return sldns_str2wire_svcbparam_ipv4hint(val, rd, rd_len); |
1590 | 0 | case SVCB_KEY_IPV6HINT: |
1591 | 0 | return sldns_str2wire_svcbparam_ipv6hint(val, rd, rd_len); |
1592 | 0 | case SVCB_KEY_MANDATORY: |
1593 | 0 | return sldns_str2wire_svcbparam_mandatory(val, rd, rd_len); |
1594 | | #ifdef SVCB_SEMANTIC_ERRORS |
1595 | | case SVCB_KEY_NO_DEFAULT_ALPN: |
1596 | | return LDNS_WIREPARSE_ERR_SVCB_NO_DEFAULT_ALPN_VALUE; |
1597 | | #endif |
1598 | 0 | case SVCB_KEY_ECH: |
1599 | 0 | return sldns_str2wire_svcbparam_ech_value(val, rd, rd_len); |
1600 | 0 | case SVCB_KEY_ALPN: |
1601 | 0 | return sldns_str2wire_svcbparam_alpn_value(val, rd, rd_len); |
1602 | 0 | case SVCB_KEY_DOHPATH: |
1603 | 0 | return sldns_str2wire_svcbparam_dohpath_value(val, rd, rd_len); |
1604 | 0 | default: |
1605 | 0 | str_len = strlen(val); |
1606 | 0 | if (*rd_len < 4 + str_len) |
1607 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
1608 | 0 | sldns_write_uint16(rd, svcparamkey); |
1609 | 0 | sldns_write_uint16(rd + 2, str_len); |
1610 | 0 | memcpy(rd + 4, val, str_len); |
1611 | 0 | *rd_len = 4 + str_len; |
1612 | |
|
1613 | 0 | return LDNS_WIREPARSE_ERR_OK; |
1614 | 0 | } |
1615 | | |
1616 | 0 | return LDNS_WIREPARSE_ERR_GENERAL; |
1617 | 0 | } |
1618 | | |
1619 | | static int sldns_str2wire_svcparam_buf(const char* str, uint8_t* rd, size_t* rd_len) |
1620 | 0 | { |
1621 | 0 | const char* eq_pos; |
1622 | 0 | char unescaped_val[LDNS_MAX_RDFLEN]; |
1623 | 0 | char* val_out = unescaped_val; |
1624 | 0 | const char* val_in; |
1625 | |
|
1626 | 0 | eq_pos = strchr(str, '='); |
1627 | | |
1628 | | /* case: key=value */ |
1629 | 0 | if (eq_pos != NULL && eq_pos[1]) { |
1630 | 0 | val_in = eq_pos + 1; |
1631 | | |
1632 | | /* unescape characters and "" blocks */ |
1633 | 0 | if (*val_in == '"') { |
1634 | 0 | val_in++; |
1635 | 0 | while (*val_in != '"' |
1636 | 0 | && (size_t)(val_out - unescaped_val + 1) < sizeof(unescaped_val) |
1637 | 0 | && sldns_parse_char( (uint8_t*) val_out, &val_in)) { |
1638 | 0 | val_out++; |
1639 | 0 | } |
1640 | 0 | } else { |
1641 | 0 | while ((size_t)(val_out - unescaped_val + 1) < sizeof(unescaped_val) |
1642 | 0 | && sldns_parse_char( (uint8_t*) val_out, &val_in)) { |
1643 | 0 | val_out++; |
1644 | 0 | } |
1645 | 0 | } |
1646 | 0 | *val_out = 0; |
1647 | |
|
1648 | 0 | return sldns_str2wire_svcparam_value(str, eq_pos - str, |
1649 | 0 | unescaped_val[0] ? unescaped_val : NULL, rd, rd_len); |
1650 | 0 | } |
1651 | | /* case: key= */ |
1652 | 0 | else if (eq_pos != NULL && !(eq_pos[1])) { |
1653 | 0 | return sldns_str2wire_svcparam_value(str, eq_pos - str, NULL, rd, rd_len); |
1654 | 0 | } |
1655 | | /* case: key */ |
1656 | 0 | else { |
1657 | 0 | return sldns_str2wire_svcparam_value(str, strlen(str), NULL, rd, rd_len); |
1658 | 0 | } |
1659 | 0 | } |
1660 | | |
1661 | | int sldns_str2wire_rdf_buf(const char* str, uint8_t* rd, size_t* len, |
1662 | | sldns_rdf_type rdftype) |
1663 | 0 | { |
1664 | 0 | switch (rdftype) { |
1665 | 0 | case LDNS_RDF_TYPE_DNAME: |
1666 | 0 | return sldns_str2wire_dname_buf(str, rd, len); |
1667 | 0 | case LDNS_RDF_TYPE_INT8: |
1668 | 0 | return sldns_str2wire_int8_buf(str, rd, len); |
1669 | 0 | case LDNS_RDF_TYPE_INT16: |
1670 | 0 | return sldns_str2wire_int16_buf(str, rd, len); |
1671 | 0 | case LDNS_RDF_TYPE_INT32: |
1672 | 0 | return sldns_str2wire_int32_buf(str, rd, len); |
1673 | 0 | case LDNS_RDF_TYPE_A: |
1674 | 0 | return sldns_str2wire_a_buf(str, rd, len); |
1675 | 0 | case LDNS_RDF_TYPE_AAAA: |
1676 | 0 | return sldns_str2wire_aaaa_buf(str, rd, len); |
1677 | 0 | case LDNS_RDF_TYPE_STR: |
1678 | 0 | return sldns_str2wire_str_buf(str, rd, len); |
1679 | 0 | case LDNS_RDF_TYPE_APL: |
1680 | 0 | return sldns_str2wire_apl_buf(str, rd, len); |
1681 | 0 | case LDNS_RDF_TYPE_B64: |
1682 | 0 | return sldns_str2wire_b64_buf(str, rd, len); |
1683 | 0 | case LDNS_RDF_TYPE_B32_EXT: |
1684 | 0 | return sldns_str2wire_b32_ext_buf(str, rd, len); |
1685 | 0 | case LDNS_RDF_TYPE_HEX: |
1686 | 0 | return sldns_str2wire_hex_buf(str, rd, len); |
1687 | 0 | case LDNS_RDF_TYPE_NSEC: |
1688 | 0 | return sldns_str2wire_nsec_buf(str, rd, len); |
1689 | 0 | case LDNS_RDF_TYPE_TYPE: |
1690 | 0 | return sldns_str2wire_type_buf(str, rd, len); |
1691 | 0 | case LDNS_RDF_TYPE_CLASS: |
1692 | 0 | return sldns_str2wire_class_buf(str, rd, len); |
1693 | 0 | case LDNS_RDF_TYPE_CERT_ALG: |
1694 | 0 | return sldns_str2wire_cert_alg_buf(str, rd, len); |
1695 | 0 | case LDNS_RDF_TYPE_ALG: |
1696 | 0 | return sldns_str2wire_alg_buf(str, rd, len); |
1697 | 0 | case LDNS_RDF_TYPE_TIME: |
1698 | 0 | return sldns_str2wire_time_buf(str, rd, len); |
1699 | 0 | case LDNS_RDF_TYPE_PERIOD: |
1700 | 0 | return sldns_str2wire_period_buf(str, rd, len); |
1701 | 0 | case LDNS_RDF_TYPE_TSIGTIME: |
1702 | 0 | return sldns_str2wire_tsigtime_buf(str, rd, len); |
1703 | 0 | case LDNS_RDF_TYPE_LOC: |
1704 | 0 | return sldns_str2wire_loc_buf(str, rd, len); |
1705 | 0 | case LDNS_RDF_TYPE_WKS: |
1706 | 0 | return sldns_str2wire_wks_buf(str, rd, len); |
1707 | 0 | case LDNS_RDF_TYPE_NSAP: |
1708 | 0 | return sldns_str2wire_nsap_buf(str, rd, len); |
1709 | 0 | case LDNS_RDF_TYPE_ATMA: |
1710 | 0 | return sldns_str2wire_atma_buf(str, rd, len); |
1711 | 0 | case LDNS_RDF_TYPE_IPSECKEY: |
1712 | 0 | return sldns_str2wire_ipseckey_buf(str, rd, len); |
1713 | 0 | case LDNS_RDF_TYPE_NSEC3_SALT: |
1714 | 0 | return sldns_str2wire_nsec3_salt_buf(str, rd, len); |
1715 | 0 | case LDNS_RDF_TYPE_NSEC3_NEXT_OWNER: |
1716 | 0 | return sldns_str2wire_b32_ext_buf(str, rd, len); |
1717 | 0 | case LDNS_RDF_TYPE_ILNP64: |
1718 | 0 | return sldns_str2wire_ilnp64_buf(str, rd, len); |
1719 | 0 | case LDNS_RDF_TYPE_EUI48: |
1720 | 0 | return sldns_str2wire_eui48_buf(str, rd, len); |
1721 | 0 | case LDNS_RDF_TYPE_EUI64: |
1722 | 0 | return sldns_str2wire_eui64_buf(str, rd, len); |
1723 | 0 | case LDNS_RDF_TYPE_UNQUOTED: |
1724 | 0 | return sldns_str2wire_unquoted_buf(str, rd, len); |
1725 | 0 | case LDNS_RDF_TYPE_TAG: |
1726 | 0 | return sldns_str2wire_tag_buf(str, rd, len); |
1727 | 0 | case LDNS_RDF_TYPE_LONG_STR: |
1728 | 0 | return sldns_str2wire_long_str_buf(str, rd, len); |
1729 | 0 | case LDNS_RDF_TYPE_TSIGERROR: |
1730 | 0 | return sldns_str2wire_tsigerror_buf(str, rd, len); |
1731 | 0 | case LDNS_RDF_TYPE_HIP: |
1732 | 0 | return sldns_str2wire_hip_buf(str, rd, len); |
1733 | 0 | case LDNS_RDF_TYPE_INT16_DATA: |
1734 | 0 | return sldns_str2wire_int16_data_buf(str, rd, len); |
1735 | 0 | case LDNS_RDF_TYPE_SVCPARAM: |
1736 | 0 | return sldns_str2wire_svcparam_buf(str, rd, len); |
1737 | 0 | case LDNS_RDF_TYPE_UNKNOWN: |
1738 | 0 | case LDNS_RDF_TYPE_SERVICE: |
1739 | 0 | return LDNS_WIREPARSE_ERR_NOT_IMPL; |
1740 | 0 | case LDNS_RDF_TYPE_NONE: |
1741 | 0 | default: |
1742 | 0 | break; |
1743 | 0 | } |
1744 | 0 | return LDNS_WIREPARSE_ERR_GENERAL; |
1745 | 0 | } |
1746 | | |
1747 | | int sldns_str2wire_int8_buf(const char* str, uint8_t* rd, size_t* len) |
1748 | 0 | { |
1749 | 0 | char* end; |
1750 | 0 | uint8_t r = (uint8_t)strtol((char*)str, &end, 10); |
1751 | 0 | if(*end != 0) |
1752 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_INT, end-(char*)str); |
1753 | 0 | if(*len < 1) |
1754 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
1755 | 0 | rd[0] = r; |
1756 | 0 | *len = 1; |
1757 | 0 | return LDNS_WIREPARSE_ERR_OK; |
1758 | 0 | } |
1759 | | |
1760 | | int sldns_str2wire_int16_buf(const char* str, uint8_t* rd, size_t* len) |
1761 | 0 | { |
1762 | 0 | char* end; |
1763 | 0 | uint16_t r = (uint16_t)strtol((char*)str, &end, 10); |
1764 | 0 | if(*end != 0) |
1765 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_INT, end-(char*)str); |
1766 | 0 | if(*len < 2) |
1767 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
1768 | 0 | sldns_write_uint16(rd, r); |
1769 | 0 | *len = 2; |
1770 | 0 | return LDNS_WIREPARSE_ERR_OK; |
1771 | 0 | } |
1772 | | |
1773 | | int sldns_str2wire_int32_buf(const char* str, uint8_t* rd, size_t* len) |
1774 | 0 | { |
1775 | 0 | char* end; |
1776 | 0 | uint32_t r; |
1777 | 0 | errno = 0; /* must set to zero before call, |
1778 | | note race condition on errno */ |
1779 | 0 | if(*str == '-') |
1780 | 0 | r = (uint32_t)strtol((char*)str, &end, 10); |
1781 | 0 | else r = (uint32_t)strtoul((char*)str, &end, 10); |
1782 | 0 | if(*end != 0) |
1783 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_INT, end-(char*)str); |
1784 | 0 | if(errno == ERANGE) |
1785 | 0 | return LDNS_WIREPARSE_ERR_SYNTAX_INTEGER_OVERFLOW; |
1786 | 0 | if(*len < 4) |
1787 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
1788 | 0 | sldns_write_uint32(rd, r); |
1789 | 0 | *len = 4; |
1790 | 0 | return LDNS_WIREPARSE_ERR_OK; |
1791 | 0 | } |
1792 | | |
1793 | | int sldns_str2wire_a_buf(const char* str, uint8_t* rd, size_t* len) |
1794 | 0 | { |
1795 | 0 | struct in_addr address; |
1796 | 0 | if(inet_pton(AF_INET, (char*)str, &address) != 1) |
1797 | 0 | return LDNS_WIREPARSE_ERR_SYNTAX_IP4; |
1798 | 0 | if(*len < sizeof(address)) |
1799 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
1800 | 0 | memmove(rd, &address, sizeof(address)); |
1801 | 0 | *len = sizeof(address); |
1802 | 0 | return LDNS_WIREPARSE_ERR_OK; |
1803 | 0 | } |
1804 | | |
1805 | | int sldns_str2wire_aaaa_buf(const char* str, uint8_t* rd, size_t* len) |
1806 | 0 | { |
1807 | 0 | #ifdef AF_INET6 |
1808 | 0 | uint8_t address[LDNS_IP6ADDRLEN + 1]; |
1809 | 0 | if(inet_pton(AF_INET6, (char*)str, address) != 1) |
1810 | 0 | return LDNS_WIREPARSE_ERR_SYNTAX_IP6; |
1811 | 0 | if(*len < LDNS_IP6ADDRLEN) |
1812 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
1813 | 0 | memmove(rd, address, LDNS_IP6ADDRLEN); |
1814 | 0 | *len = LDNS_IP6ADDRLEN; |
1815 | 0 | return LDNS_WIREPARSE_ERR_OK; |
1816 | | #else |
1817 | | return LDNS_WIREPARSE_ERR_NOT_IMPL; |
1818 | | #endif |
1819 | 0 | } |
1820 | | |
1821 | | int sldns_str2wire_str_buf(const char* str, uint8_t* rd, size_t* len) |
1822 | 0 | { |
1823 | 0 | uint8_t ch = 0; |
1824 | 0 | size_t sl = 0; |
1825 | 0 | const char* s = str; |
1826 | | /* skip length byte */ |
1827 | 0 | if(*len < 1) |
1828 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
1829 | | |
1830 | | /* read characters */ |
1831 | 0 | while(sldns_parse_char(&ch, &s)) { |
1832 | 0 | if(sl >= 255) |
1833 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_INVALID_STR, s-str); |
1834 | 0 | if(*len < sl+2) |
1835 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL, |
1836 | 0 | s-str); |
1837 | 0 | rd[++sl] = ch; |
1838 | 0 | } |
1839 | 0 | if(!s) |
1840 | 0 | return LDNS_WIREPARSE_ERR_SYNTAX_BAD_ESCAPE; |
1841 | 0 | rd[0] = (uint8_t)sl; |
1842 | 0 | *len = sl+1; |
1843 | 0 | return LDNS_WIREPARSE_ERR_OK; |
1844 | 0 | } |
1845 | | |
1846 | | int sldns_str2wire_apl_buf(const char* str, uint8_t* rd, size_t* len) |
1847 | 0 | { |
1848 | 0 | const char *my_str = str; |
1849 | |
|
1850 | 0 | char my_ip_str[64]; |
1851 | 0 | size_t ip_str_len; |
1852 | |
|
1853 | 0 | uint16_t family; |
1854 | 0 | int negation; |
1855 | 0 | size_t adflength = 0; |
1856 | 0 | uint8_t data[16+4]; |
1857 | 0 | uint8_t prefix; |
1858 | 0 | size_t i; |
1859 | |
|
1860 | 0 | if(*my_str == '\0') { |
1861 | | /* empty APL element, no data, no string */ |
1862 | 0 | *len = 0; |
1863 | 0 | return LDNS_WIREPARSE_ERR_OK; |
1864 | 0 | } |
1865 | | |
1866 | | /* [!]afi:address/prefix */ |
1867 | 0 | if (strlen(my_str) < 2 |
1868 | 0 | || strchr(my_str, ':') == NULL |
1869 | 0 | || strchr(my_str, '/') == NULL |
1870 | 0 | || strchr(my_str, ':') > strchr(my_str, '/')) { |
1871 | 0 | return LDNS_WIREPARSE_ERR_INVALID_STR; |
1872 | 0 | } |
1873 | | |
1874 | 0 | if (my_str[0] == '!') { |
1875 | 0 | negation = 1; |
1876 | 0 | my_str += 1; |
1877 | 0 | } else { |
1878 | 0 | negation = 0; |
1879 | 0 | } |
1880 | |
|
1881 | 0 | family = (uint16_t) atoi(my_str); |
1882 | |
|
1883 | 0 | my_str = strchr(my_str, ':') + 1; |
1884 | | |
1885 | | /* need ip addr and only ip addr for inet_pton */ |
1886 | 0 | ip_str_len = (size_t) (strchr(my_str, '/') - my_str); |
1887 | 0 | if(ip_str_len+1 > sizeof(my_ip_str)) |
1888 | 0 | return LDNS_WIREPARSE_ERR_INVALID_STR; |
1889 | 0 | (void)strlcpy(my_ip_str, my_str, sizeof(my_ip_str)); |
1890 | 0 | my_ip_str[ip_str_len] = 0; |
1891 | |
|
1892 | 0 | if (family == 1) { |
1893 | | /* ipv4 */ |
1894 | 0 | if(inet_pton(AF_INET, my_ip_str, data+4) == 0) |
1895 | 0 | return LDNS_WIREPARSE_ERR_INVALID_STR; |
1896 | 0 | for (i = 0; i < 4; i++) { |
1897 | 0 | if (data[i+4] != 0) { |
1898 | 0 | adflength = i + 1; |
1899 | 0 | } |
1900 | 0 | } |
1901 | 0 | } else if (family == 2) { |
1902 | | /* ipv6 */ |
1903 | 0 | if (inet_pton(AF_INET6, my_ip_str, data+4) == 0) |
1904 | 0 | return LDNS_WIREPARSE_ERR_INVALID_STR; |
1905 | 0 | for (i = 0; i < 16; i++) { |
1906 | 0 | if (data[i+4] != 0) { |
1907 | 0 | adflength = i + 1; |
1908 | 0 | } |
1909 | 0 | } |
1910 | 0 | } else { |
1911 | | /* unknown family */ |
1912 | 0 | return LDNS_WIREPARSE_ERR_INVALID_STR; |
1913 | 0 | } |
1914 | | |
1915 | 0 | my_str = strchr(my_str, '/') + 1; |
1916 | 0 | prefix = (uint8_t) atoi(my_str); |
1917 | |
|
1918 | 0 | sldns_write_uint16(data, family); |
1919 | 0 | data[2] = prefix; |
1920 | 0 | data[3] = (uint8_t)adflength; |
1921 | 0 | if (negation) { |
1922 | | /* set bit 1 of byte 3 */ |
1923 | 0 | data[3] = data[3] | 0x80; |
1924 | 0 | } |
1925 | |
|
1926 | 0 | if(*len < 4+adflength) |
1927 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
1928 | 0 | memmove(rd, data, 4+adflength); |
1929 | 0 | *len = 4+adflength; |
1930 | 0 | return LDNS_WIREPARSE_ERR_OK; |
1931 | 0 | } |
1932 | | |
1933 | | int sldns_str2wire_b64_buf(const char* str, uint8_t* rd, size_t* len) |
1934 | 0 | { |
1935 | 0 | size_t sz = sldns_b64_pton_calculate_size(strlen(str)); |
1936 | 0 | int n; |
1937 | 0 | if(strcmp(str, "0") == 0) { |
1938 | 0 | *len = 0; |
1939 | 0 | return LDNS_WIREPARSE_ERR_OK; |
1940 | 0 | } |
1941 | 0 | if(*len < sz) |
1942 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
1943 | 0 | n = sldns_b64_pton(str, rd, *len); |
1944 | 0 | if(n < 0) |
1945 | 0 | return LDNS_WIREPARSE_ERR_SYNTAX_B64; |
1946 | 0 | *len = (size_t)n; |
1947 | 0 | return LDNS_WIREPARSE_ERR_OK; |
1948 | 0 | } |
1949 | | |
1950 | | int sldns_str2wire_b32_ext_buf(const char* str, uint8_t* rd, size_t* len) |
1951 | 0 | { |
1952 | 0 | size_t slen = strlen(str); |
1953 | 0 | size_t sz = sldns_b32_pton_calculate_size(slen); |
1954 | 0 | int n; |
1955 | 0 | if(*len < 1+sz) |
1956 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
1957 | 0 | rd[0] = (uint8_t)sz; |
1958 | 0 | n = sldns_b32_pton_extended_hex(str, slen, rd+1, *len-1); |
1959 | 0 | if(n < 0) |
1960 | 0 | return LDNS_WIREPARSE_ERR_SYNTAX_B32_EXT; |
1961 | 0 | *len = (size_t)n+1; |
1962 | 0 | return LDNS_WIREPARSE_ERR_OK; |
1963 | 0 | } |
1964 | | |
1965 | | /** see if the string ends, or ends in whitespace */ |
1966 | | static int |
1967 | | sldns_is_last_of_string(const char* str) |
1968 | 0 | { |
1969 | 0 | if(*str == 0) return 1; |
1970 | 0 | while(isspace((unsigned char)*str)) |
1971 | 0 | str++; |
1972 | 0 | if(*str == 0) return 1; |
1973 | 0 | return 0; |
1974 | 0 | } |
1975 | | |
1976 | | int sldns_str2wire_hex_buf(const char* str, uint8_t* rd, size_t* len) |
1977 | 0 | { |
1978 | 0 | const char* s = str; |
1979 | 0 | size_t dlen = 0; /* number of hexdigits parsed */ |
1980 | 0 | while(*s) { |
1981 | 0 | if(isspace((unsigned char)*s)) { |
1982 | 0 | s++; |
1983 | 0 | continue; |
1984 | 0 | } |
1985 | 0 | if(dlen == 0 && *s == '0' && sldns_is_last_of_string(s+1)) { |
1986 | 0 | *len = 0; |
1987 | 0 | return LDNS_WIREPARSE_ERR_OK; |
1988 | 0 | } |
1989 | 0 | if(!isxdigit((unsigned char)*s)) |
1990 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_HEX, s-str); |
1991 | 0 | if(*len < dlen/2 + 1) |
1992 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL, |
1993 | 0 | s-str); |
1994 | 0 | if((dlen&1)==0) |
1995 | 0 | rd[dlen/2] = (uint8_t)sldns_hexdigit_to_int(*s++) * 16; |
1996 | 0 | else rd[dlen/2] += (uint8_t)sldns_hexdigit_to_int(*s++); |
1997 | 0 | dlen++; |
1998 | 0 | } |
1999 | 0 | if((dlen&1)!=0) |
2000 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_HEX, s-str); |
2001 | 0 | *len = dlen/2; |
2002 | 0 | return LDNS_WIREPARSE_ERR_OK; |
2003 | 0 | } |
2004 | | |
2005 | | int sldns_str2wire_nsec_buf(const char* str, uint8_t* rd, size_t* len) |
2006 | 0 | { |
2007 | 0 | const char *delim = "\n\t "; |
2008 | 0 | char token[64]; /* for a type name */ |
2009 | 0 | size_t type_count = 0; |
2010 | 0 | int block; |
2011 | 0 | size_t used = 0; |
2012 | 0 | uint16_t maxtype = 0; |
2013 | 0 | uint8_t typebits[8192]; /* 65536 bits */ |
2014 | 0 | uint8_t window_in_use[256]; |
2015 | | |
2016 | | /* string in buffer */ |
2017 | 0 | sldns_buffer strbuf; |
2018 | 0 | sldns_buffer_init_frm_data(&strbuf, (uint8_t*)str, strlen(str)); |
2019 | | |
2020 | | /* parse the types */ |
2021 | 0 | memset(typebits, 0, sizeof(typebits)); |
2022 | 0 | memset(window_in_use, 0, sizeof(window_in_use)); |
2023 | 0 | while(sldns_buffer_remaining(&strbuf) > 0 && |
2024 | 0 | sldns_bget_token(&strbuf, token, delim, sizeof(token)) != -1) { |
2025 | 0 | uint16_t t = sldns_get_rr_type_by_name(token); |
2026 | 0 | if(token[0] == 0) |
2027 | 0 | continue; |
2028 | 0 | if(t == 0 && strcmp(token, "TYPE0") != 0) |
2029 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_TYPE, |
2030 | 0 | sldns_buffer_position(&strbuf)); |
2031 | 0 | typebits[t/8] |= (0x80>>(t%8)); |
2032 | 0 | window_in_use[t/256] = 1; |
2033 | 0 | type_count++; |
2034 | 0 | if(t > maxtype) maxtype = t; |
2035 | 0 | } |
2036 | | |
2037 | | /* empty NSEC bitmap */ |
2038 | 0 | if(type_count == 0) { |
2039 | 0 | *len = 0; |
2040 | 0 | return LDNS_WIREPARSE_ERR_OK; |
2041 | 0 | } |
2042 | | |
2043 | | /* encode windows {u8 windowblock, u8 bitmaplength, 0-32u8 bitmap}, |
2044 | | * block is 0-255 upper octet of types, length if 0-32. */ |
2045 | 0 | for(block = 0; block <= (int)maxtype/256; block++) { |
2046 | 0 | int i, blocklen = 0; |
2047 | 0 | if(!window_in_use[block]) |
2048 | 0 | continue; |
2049 | 0 | for(i=0; i<32; i++) { |
2050 | 0 | if(typebits[block*32+i] != 0) |
2051 | 0 | blocklen = i+1; |
2052 | 0 | } |
2053 | 0 | if(blocklen == 0) |
2054 | 0 | continue; /* empty window should have been !in_use */ |
2055 | 0 | if(used+blocklen+2 > *len) |
2056 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
2057 | 0 | rd[used+0] = (uint8_t)block; |
2058 | 0 | rd[used+1] = (uint8_t)blocklen; |
2059 | 0 | for(i=0; i<blocklen; i++) { |
2060 | 0 | rd[used+2+i] = typebits[block*32+i]; |
2061 | 0 | } |
2062 | 0 | used += blocklen+2; |
2063 | 0 | } |
2064 | 0 | *len = used; |
2065 | 0 | return LDNS_WIREPARSE_ERR_OK; |
2066 | 0 | } |
2067 | | |
2068 | | int sldns_str2wire_type_buf(const char* str, uint8_t* rd, size_t* len) |
2069 | 0 | { |
2070 | 0 | uint16_t t = sldns_get_rr_type_by_name(str); |
2071 | 0 | if(t == 0 && strcmp(str, "TYPE0") != 0) |
2072 | 0 | return LDNS_WIREPARSE_ERR_SYNTAX_TYPE; |
2073 | 0 | if(*len < 2) |
2074 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
2075 | 0 | sldns_write_uint16(rd, t); |
2076 | 0 | *len = 2; |
2077 | 0 | return LDNS_WIREPARSE_ERR_OK; |
2078 | 0 | } |
2079 | | |
2080 | | int sldns_str2wire_class_buf(const char* str, uint8_t* rd, size_t* len) |
2081 | 0 | { |
2082 | 0 | uint16_t c = sldns_get_rr_class_by_name(str); |
2083 | 0 | if(c == 0 && strcmp(str, "CLASS0") != 0) |
2084 | 0 | return LDNS_WIREPARSE_ERR_SYNTAX_CLASS; |
2085 | 0 | if(*len < 2) |
2086 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
2087 | 0 | sldns_write_uint16(rd, c); |
2088 | 0 | *len = 2; |
2089 | 0 | return LDNS_WIREPARSE_ERR_OK; |
2090 | 0 | } |
2091 | | |
2092 | | /* An certificate alg field can either be specified as a 8 bits number |
2093 | | * or by its symbolic name. Handle both */ |
2094 | | int sldns_str2wire_cert_alg_buf(const char* str, uint8_t* rd, size_t* len) |
2095 | 0 | { |
2096 | 0 | sldns_lookup_table *lt = sldns_lookup_by_name(sldns_cert_algorithms, |
2097 | 0 | str); |
2098 | 0 | if(*len < 2) |
2099 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
2100 | 0 | if(lt) { |
2101 | 0 | sldns_write_uint16(rd, (uint16_t)lt->id); |
2102 | 0 | } else { |
2103 | 0 | int s = sldns_str2wire_int16_buf(str, rd, len); |
2104 | 0 | if(s) return s; |
2105 | 0 | if(sldns_read_uint16(rd) == 0) |
2106 | 0 | return LDNS_WIREPARSE_ERR_CERT_BAD_ALGORITHM; |
2107 | 0 | } |
2108 | 0 | *len = 2; |
2109 | 0 | return LDNS_WIREPARSE_ERR_OK; |
2110 | 0 | } |
2111 | | |
2112 | | /* An alg field can either be specified as a 8 bits number |
2113 | | * or by its symbolic name. Handle both */ |
2114 | | int sldns_str2wire_alg_buf(const char* str, uint8_t* rd, size_t* len) |
2115 | 0 | { |
2116 | 0 | sldns_lookup_table *lt = sldns_lookup_by_name(sldns_algorithms, str); |
2117 | 0 | if(*len < 1) |
2118 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
2119 | 0 | if(lt) { |
2120 | 0 | rd[0] = (uint8_t)lt->id; |
2121 | 0 | *len = 1; |
2122 | 0 | } else { |
2123 | | /* try as-is (a number) */ |
2124 | 0 | return sldns_str2wire_int8_buf(str, rd, len); |
2125 | 0 | } |
2126 | 0 | return LDNS_WIREPARSE_ERR_OK; |
2127 | 0 | } |
2128 | | |
2129 | | int sldns_str2wire_tsigerror_buf(const char* str, uint8_t* rd, size_t* len) |
2130 | 0 | { |
2131 | 0 | sldns_lookup_table *lt = sldns_lookup_by_name(sldns_tsig_errors, str); |
2132 | 0 | if(*len < 2) |
2133 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
2134 | 0 | if(lt) { |
2135 | 0 | sldns_write_uint16(rd, (uint16_t)lt->id); |
2136 | 0 | *len = 2; |
2137 | 0 | } else { |
2138 | | /* try as-is (a number) */ |
2139 | 0 | return sldns_str2wire_int16_buf(str, rd, len); |
2140 | 0 | } |
2141 | 0 | return LDNS_WIREPARSE_ERR_OK; |
2142 | 0 | } |
2143 | | |
2144 | | int sldns_str2wire_time_buf(const char* str, uint8_t* rd, size_t* len) |
2145 | 0 | { |
2146 | | /* convert a time YYYYDDMMHHMMSS to wireformat */ |
2147 | 0 | struct tm tm; |
2148 | 0 | if(*len < 4) |
2149 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
2150 | | |
2151 | | /* Try to scan the time... */ |
2152 | 0 | memset(&tm, 0, sizeof(tm)); |
2153 | 0 | if (strlen(str) == 14 && sscanf(str, "%4d%2d%2d%2d%2d%2d", |
2154 | 0 | &tm.tm_year, &tm.tm_mon, &tm.tm_mday, &tm.tm_hour, |
2155 | 0 | &tm.tm_min, &tm.tm_sec) == 6) { |
2156 | 0 | tm.tm_year -= 1900; |
2157 | 0 | tm.tm_mon--; |
2158 | | /* Check values */ |
2159 | 0 | if (tm.tm_year < 70) |
2160 | 0 | return LDNS_WIREPARSE_ERR_SYNTAX_TIME; |
2161 | 0 | if (tm.tm_mon < 0 || tm.tm_mon > 11) |
2162 | 0 | return LDNS_WIREPARSE_ERR_SYNTAX_TIME; |
2163 | 0 | if (tm.tm_mday < 1 || tm.tm_mday > 31) |
2164 | 0 | return LDNS_WIREPARSE_ERR_SYNTAX_TIME; |
2165 | 0 | if (tm.tm_hour < 0 || tm.tm_hour > 23) |
2166 | 0 | return LDNS_WIREPARSE_ERR_SYNTAX_TIME; |
2167 | 0 | if (tm.tm_min < 0 || tm.tm_min > 59) |
2168 | 0 | return LDNS_WIREPARSE_ERR_SYNTAX_TIME; |
2169 | 0 | if (tm.tm_sec < 0 || tm.tm_sec > 59) |
2170 | 0 | return LDNS_WIREPARSE_ERR_SYNTAX_TIME; |
2171 | | |
2172 | 0 | sldns_write_uint32(rd, (uint32_t)sldns_mktime_from_utc(&tm)); |
2173 | 0 | } else { |
2174 | | /* handle it as 32 bits timestamp */ |
2175 | 0 | char *end; |
2176 | 0 | uint32_t l = (uint32_t)strtol((char*)str, &end, 10); |
2177 | 0 | if(*end != 0) |
2178 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_TIME, |
2179 | 0 | end-(char*)str); |
2180 | 0 | sldns_write_uint32(rd, l); |
2181 | 0 | } |
2182 | 0 | *len = 4; |
2183 | 0 | return LDNS_WIREPARSE_ERR_OK; |
2184 | 0 | } |
2185 | | |
2186 | | int sldns_str2wire_tsigtime_buf(const char* str, uint8_t* rd, size_t* len) |
2187 | 0 | { |
2188 | 0 | char* end; |
2189 | 0 | uint64_t t = (uint64_t)strtol((char*)str, &end, 10); |
2190 | 0 | uint16_t high; |
2191 | 0 | uint32_t low; |
2192 | 0 | if(*end != 0) |
2193 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_TIME, end-str); |
2194 | 0 | if(*len < 6) |
2195 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
2196 | 0 | high = (uint16_t)(t>>32); |
2197 | 0 | low = (uint32_t)(t); |
2198 | 0 | sldns_write_uint16(rd, high); |
2199 | 0 | sldns_write_uint32(rd+2, low); |
2200 | 0 | *len = 6; |
2201 | 0 | return LDNS_WIREPARSE_ERR_OK; |
2202 | 0 | } |
2203 | | |
2204 | | int sldns_str2wire_period_buf(const char* str, uint8_t* rd, size_t* len) |
2205 | 0 | { |
2206 | 0 | const char* end; |
2207 | 0 | int overflow; |
2208 | 0 | uint32_t p = sldns_str2period(str, &end, &overflow); |
2209 | 0 | if(*end != 0) |
2210 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_PERIOD, end-str); |
2211 | 0 | if(overflow) |
2212 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_INTEGER_OVERFLOW, |
2213 | 0 | end-str); |
2214 | 0 | if(*len < 4) |
2215 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
2216 | 0 | sldns_write_uint32(rd, p); |
2217 | 0 | *len = 4; |
2218 | 0 | return LDNS_WIREPARSE_ERR_OK; |
2219 | 0 | } |
2220 | | |
2221 | | /** read "<digits>[.<digits>][mM]" into mantissa exponent format for LOC type */ |
2222 | | static int |
2223 | | loc_parse_cm(char* my_str, char** endstr, uint8_t* m, uint8_t* e) |
2224 | 0 | { |
2225 | 0 | uint32_t meters = 0, cm = 0, val; |
2226 | 0 | char* cm_endstr; |
2227 | 0 | while (isblank((unsigned char)*my_str)) { |
2228 | 0 | my_str++; |
2229 | 0 | } |
2230 | 0 | meters = (uint32_t)strtol(my_str, &my_str, 10); |
2231 | 0 | if (*my_str == '.') { |
2232 | 0 | my_str++; |
2233 | 0 | cm = (uint32_t)strtol(my_str, &cm_endstr, 10); |
2234 | 0 | if(cm_endstr == my_str + 1) |
2235 | 0 | cm *= 10; |
2236 | 0 | my_str = cm_endstr; |
2237 | 0 | } |
2238 | 0 | if (meters >= 1) { |
2239 | 0 | *e = 2; |
2240 | 0 | val = meters; |
2241 | 0 | } else { |
2242 | 0 | *e = 0; |
2243 | 0 | val = cm; |
2244 | 0 | } |
2245 | 0 | while(val >= 10) { |
2246 | 0 | (*e)++; |
2247 | 0 | val /= 10; |
2248 | 0 | } |
2249 | 0 | *m = (uint8_t)val; |
2250 | |
|
2251 | 0 | if (*e > 9) |
2252 | 0 | return 0; |
2253 | 0 | if (*my_str == 'm' || *my_str == 'M') { |
2254 | 0 | my_str++; |
2255 | 0 | } |
2256 | 0 | *endstr = my_str; |
2257 | 0 | return 1; |
2258 | 0 | } |
2259 | | |
2260 | | int sldns_str2wire_loc_buf(const char* str, uint8_t* rd, size_t* len) |
2261 | 0 | { |
2262 | 0 | uint32_t latitude = 0; |
2263 | 0 | uint32_t longitude = 0; |
2264 | 0 | uint32_t altitude = 0; |
2265 | |
|
2266 | 0 | uint32_t equator = (uint32_t)1<<31; /* 2**31 */ |
2267 | | |
2268 | | /* only support version 0 */ |
2269 | 0 | uint32_t h = 0; |
2270 | 0 | uint32_t m = 0; |
2271 | 0 | uint8_t size_b = 1, size_e = 2; |
2272 | 0 | uint8_t horiz_pre_b = 1, horiz_pre_e = 6; |
2273 | 0 | uint8_t vert_pre_b = 1, vert_pre_e = 3; |
2274 | |
|
2275 | 0 | double s = 0.0; |
2276 | 0 | int northerness; |
2277 | 0 | int easterness; |
2278 | |
|
2279 | 0 | char *my_str = (char *) str; |
2280 | |
|
2281 | 0 | if (isdigit((unsigned char) *my_str)) { |
2282 | 0 | h = (uint32_t) strtol(my_str, &my_str, 10); |
2283 | 0 | } else { |
2284 | 0 | return LDNS_WIREPARSE_ERR_INVALID_STR; |
2285 | 0 | } |
2286 | | |
2287 | 0 | while (isblank((unsigned char) *my_str)) { |
2288 | 0 | my_str++; |
2289 | 0 | } |
2290 | |
|
2291 | 0 | if (isdigit((unsigned char) *my_str)) { |
2292 | 0 | m = (uint32_t) strtol(my_str, &my_str, 10); |
2293 | 0 | } else if (*my_str == 'N' || *my_str == 'S') { |
2294 | 0 | goto north; |
2295 | 0 | } else { |
2296 | 0 | return LDNS_WIREPARSE_ERR_INVALID_STR; |
2297 | 0 | } |
2298 | | |
2299 | 0 | while (isblank((unsigned char) *my_str)) { |
2300 | 0 | my_str++; |
2301 | 0 | } |
2302 | |
|
2303 | 0 | if (isdigit((unsigned char) *my_str)) { |
2304 | 0 | s = strtod(my_str, &my_str); |
2305 | 0 | } |
2306 | | |
2307 | | /* skip blanks before northerness */ |
2308 | 0 | while (isblank((unsigned char) *my_str)) { |
2309 | 0 | my_str++; |
2310 | 0 | } |
2311 | |
|
2312 | 0 | north: |
2313 | 0 | if (*my_str == 'N') { |
2314 | 0 | northerness = 1; |
2315 | 0 | } else if (*my_str == 'S') { |
2316 | 0 | northerness = 0; |
2317 | 0 | } else { |
2318 | 0 | return LDNS_WIREPARSE_ERR_INVALID_STR; |
2319 | 0 | } |
2320 | | |
2321 | 0 | my_str++; |
2322 | | |
2323 | | /* store number */ |
2324 | 0 | s = 1000.0 * s; |
2325 | | /* add a little to make floor in conversion a round */ |
2326 | 0 | s += 0.0005; |
2327 | 0 | latitude = (uint32_t) s; |
2328 | 0 | latitude += 1000 * 60 * m; |
2329 | 0 | latitude += 1000 * 60 * 60 * h; |
2330 | 0 | if (northerness) { |
2331 | 0 | latitude = equator + latitude; |
2332 | 0 | } else { |
2333 | 0 | latitude = equator - latitude; |
2334 | 0 | } |
2335 | 0 | while (isblank((unsigned char)*my_str)) { |
2336 | 0 | my_str++; |
2337 | 0 | } |
2338 | |
|
2339 | 0 | if (isdigit((unsigned char) *my_str)) { |
2340 | 0 | h = (uint32_t) strtol(my_str, &my_str, 10); |
2341 | 0 | } else { |
2342 | 0 | return LDNS_WIREPARSE_ERR_INVALID_STR; |
2343 | 0 | } |
2344 | | |
2345 | 0 | while (isblank((unsigned char) *my_str)) { |
2346 | 0 | my_str++; |
2347 | 0 | } |
2348 | |
|
2349 | 0 | if (isdigit((unsigned char) *my_str)) { |
2350 | 0 | m = (uint32_t) strtol(my_str, &my_str, 10); |
2351 | 0 | } else if (*my_str == 'E' || *my_str == 'W') { |
2352 | 0 | goto east; |
2353 | 0 | } else { |
2354 | 0 | return LDNS_WIREPARSE_ERR_INVALID_STR; |
2355 | 0 | } |
2356 | | |
2357 | 0 | while (isblank((unsigned char)*my_str)) { |
2358 | 0 | my_str++; |
2359 | 0 | } |
2360 | |
|
2361 | 0 | if (isdigit((unsigned char) *my_str)) { |
2362 | 0 | s = strtod(my_str, &my_str); |
2363 | 0 | } |
2364 | | |
2365 | | /* skip blanks before easterness */ |
2366 | 0 | while (isblank((unsigned char)*my_str)) { |
2367 | 0 | my_str++; |
2368 | 0 | } |
2369 | |
|
2370 | 0 | east: |
2371 | 0 | if (*my_str == 'E') { |
2372 | 0 | easterness = 1; |
2373 | 0 | } else if (*my_str == 'W') { |
2374 | 0 | easterness = 0; |
2375 | 0 | } else { |
2376 | 0 | return LDNS_WIREPARSE_ERR_INVALID_STR; |
2377 | 0 | } |
2378 | | |
2379 | 0 | my_str++; |
2380 | | |
2381 | | /* store number */ |
2382 | 0 | s *= 1000.0; |
2383 | | /* add a little to make floor in conversion a round */ |
2384 | 0 | s += 0.0005; |
2385 | 0 | longitude = (uint32_t) s; |
2386 | 0 | longitude += 1000 * 60 * m; |
2387 | 0 | longitude += 1000 * 60 * 60 * h; |
2388 | |
|
2389 | 0 | if (easterness) { |
2390 | 0 | longitude += equator; |
2391 | 0 | } else { |
2392 | 0 | longitude = equator - longitude; |
2393 | 0 | } |
2394 | |
|
2395 | 0 | altitude = (uint32_t)(strtod(my_str, &my_str)*100.0 + |
2396 | 0 | 10000000.0 + 0.5); |
2397 | 0 | if (*my_str == 'm' || *my_str == 'M') { |
2398 | 0 | my_str++; |
2399 | 0 | } |
2400 | |
|
2401 | 0 | if (strlen(my_str) > 0) { |
2402 | 0 | if(!loc_parse_cm(my_str, &my_str, &size_b, &size_e)) |
2403 | 0 | return LDNS_WIREPARSE_ERR_INVALID_STR; |
2404 | 0 | } |
2405 | | |
2406 | 0 | if (strlen(my_str) > 0) { |
2407 | 0 | if(!loc_parse_cm(my_str, &my_str, &horiz_pre_b, &horiz_pre_e)) |
2408 | 0 | return LDNS_WIREPARSE_ERR_INVALID_STR; |
2409 | 0 | } |
2410 | | |
2411 | 0 | if (strlen(my_str) > 0) { |
2412 | 0 | if(!loc_parse_cm(my_str, &my_str, &vert_pre_b, &vert_pre_e)) |
2413 | 0 | return LDNS_WIREPARSE_ERR_INVALID_STR; |
2414 | 0 | } |
2415 | | |
2416 | 0 | if(*len < 16) |
2417 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
2418 | 0 | rd[0] = 0; |
2419 | 0 | rd[1] = ((size_b << 4) & 0xf0) | (size_e & 0x0f); |
2420 | 0 | rd[2] = ((horiz_pre_b << 4) & 0xf0) | (horiz_pre_e & 0x0f); |
2421 | 0 | rd[3] = ((vert_pre_b << 4) & 0xf0) | (vert_pre_e & 0x0f); |
2422 | 0 | sldns_write_uint32(rd + 4, latitude); |
2423 | 0 | sldns_write_uint32(rd + 8, longitude); |
2424 | 0 | sldns_write_uint32(rd + 12, altitude); |
2425 | 0 | *len = 16; |
2426 | 0 | return LDNS_WIREPARSE_ERR_OK; |
2427 | 0 | } |
2428 | | |
2429 | | static void |
2430 | | ldns_tolower_str(char* s) |
2431 | 0 | { |
2432 | 0 | if(s) { |
2433 | 0 | while(*s) { |
2434 | 0 | *s = (char)tolower((unsigned char)*s); |
2435 | 0 | s++; |
2436 | 0 | } |
2437 | 0 | } |
2438 | 0 | } |
2439 | | |
2440 | | int sldns_str2wire_wks_buf(const char* str, uint8_t* rd, size_t* len) |
2441 | 0 | { |
2442 | 0 | int rd_len = 1; |
2443 | 0 | int have_proto = 0; |
2444 | 0 | char token[50], proto_str[50]; |
2445 | 0 | sldns_buffer strbuf; |
2446 | 0 | sldns_buffer_init_frm_data(&strbuf, (uint8_t*)str, strlen(str)); |
2447 | 0 | proto_str[0]=0; |
2448 | | |
2449 | | /* check we have one byte for proto */ |
2450 | 0 | if(*len < 1) |
2451 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
2452 | | |
2453 | 0 | while(sldns_bget_token(&strbuf, token, "\t\n ", sizeof(token)) > 0) { |
2454 | 0 | ldns_tolower_str(token); |
2455 | 0 | if(!have_proto) { |
2456 | 0 | struct protoent *p = getprotobyname(token); |
2457 | 0 | have_proto = 1; |
2458 | 0 | if(p) rd[0] = (uint8_t)p->p_proto; |
2459 | 0 | else if(strcasecmp(token, "tcp")==0) rd[0]=6; |
2460 | 0 | else if(strcasecmp(token, "udp")==0) rd[0]=17; |
2461 | 0 | else rd[0] = (uint8_t)atoi(token); |
2462 | 0 | (void)strlcpy(proto_str, token, sizeof(proto_str)); |
2463 | 0 | } else { |
2464 | 0 | int serv_port; |
2465 | 0 | if(atoi(token) != 0) serv_port=atoi(token); |
2466 | 0 | else if(strcmp(token, "0") == 0) serv_port=0; |
2467 | 0 | else if(strcasecmp(token, "domain")==0) serv_port=53; |
2468 | 0 | else { |
2469 | 0 | struct servent *serv = getservbyname(token, proto_str); |
2470 | 0 | if(serv) serv_port=(int)ntohs((uint16_t)serv->s_port); |
2471 | 0 | else { |
2472 | 0 | #ifdef HAVE_ENDSERVENT |
2473 | 0 | endservent(); |
2474 | 0 | #endif |
2475 | 0 | #ifdef HAVE_ENDPROTOENT |
2476 | 0 | endprotoent(); |
2477 | 0 | #endif |
2478 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX, |
2479 | 0 | sldns_buffer_position(&strbuf)); |
2480 | 0 | } |
2481 | 0 | } |
2482 | 0 | if(serv_port < 0 || serv_port > 65535) { |
2483 | 0 | #ifdef HAVE_ENDSERVENT |
2484 | 0 | endservent(); |
2485 | 0 | #endif |
2486 | 0 | #ifdef HAVE_ENDPROTOENT |
2487 | 0 | endprotoent(); |
2488 | 0 | #endif |
2489 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX, |
2490 | 0 | sldns_buffer_position(&strbuf)); |
2491 | 0 | } |
2492 | 0 | if(rd_len < 1+serv_port/8+1) { |
2493 | | /* bitmap is larger, init new bytes at 0 */ |
2494 | 0 | if(*len < 1+(size_t)serv_port/8+1) { |
2495 | 0 | #ifdef HAVE_ENDSERVENT |
2496 | 0 | endservent(); |
2497 | 0 | #endif |
2498 | 0 | #ifdef HAVE_ENDPROTOENT |
2499 | 0 | endprotoent(); |
2500 | 0 | #endif |
2501 | 0 | return RET_ERR( |
2502 | 0 | LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL, |
2503 | 0 | sldns_buffer_position(&strbuf)); |
2504 | 0 | } |
2505 | 0 | memset(rd+rd_len, 0, 1+(size_t)serv_port/8+1-rd_len); |
2506 | 0 | rd_len = 1+serv_port/8+1; |
2507 | 0 | } |
2508 | 0 | rd[1+ serv_port/8] |= (1 << (7 - serv_port % 8)); |
2509 | 0 | } |
2510 | 0 | } |
2511 | 0 | *len = (size_t)rd_len; |
2512 | |
|
2513 | 0 | #ifdef HAVE_ENDSERVENT |
2514 | 0 | endservent(); |
2515 | 0 | #endif |
2516 | 0 | #ifdef HAVE_ENDPROTOENT |
2517 | 0 | endprotoent(); |
2518 | 0 | #endif |
2519 | 0 | return LDNS_WIREPARSE_ERR_OK; |
2520 | 0 | } |
2521 | | |
2522 | | int sldns_str2wire_nsap_buf(const char* str, uint8_t* rd, size_t* len) |
2523 | 0 | { |
2524 | 0 | const char* s = str; |
2525 | 0 | size_t slen; |
2526 | 0 | size_t dlen = 0; /* number of hexdigits parsed */ |
2527 | | |
2528 | | /* just a hex string with optional dots? */ |
2529 | 0 | if (s[0] != '0' || s[1] != 'x') |
2530 | 0 | return LDNS_WIREPARSE_ERR_INVALID_STR; |
2531 | 0 | s += 2; |
2532 | 0 | slen = strlen(s); |
2533 | 0 | if(slen > LDNS_MAX_RDFLEN*2) |
2534 | 0 | return LDNS_WIREPARSE_ERR_LABEL_OVERFLOW; |
2535 | 0 | while(*s) { |
2536 | 0 | if(isspace((unsigned char)*s) || *s == '.') { |
2537 | 0 | s++; |
2538 | 0 | continue; |
2539 | 0 | } |
2540 | 0 | if(!isxdigit((unsigned char)*s)) |
2541 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_HEX, s-str); |
2542 | 0 | if(*len < dlen/2 + 1) |
2543 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL, |
2544 | 0 | s-str); |
2545 | 0 | if((dlen&1)==0) |
2546 | 0 | rd[dlen/2] = (uint8_t)sldns_hexdigit_to_int(*s++) * 16; |
2547 | 0 | else rd[dlen/2] += sldns_hexdigit_to_int(*s++); |
2548 | 0 | dlen++; |
2549 | 0 | } |
2550 | 0 | if((dlen&1)!=0) |
2551 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_HEX, s-str); |
2552 | 0 | *len = dlen/2; |
2553 | 0 | return LDNS_WIREPARSE_ERR_OK; |
2554 | 0 | } |
2555 | | |
2556 | | int sldns_str2wire_atma_buf(const char* str, uint8_t* rd, size_t* len) |
2557 | 0 | { |
2558 | 0 | const char* s = str; |
2559 | 0 | size_t slen = strlen(str); |
2560 | 0 | size_t dlen = 0; /* number of hexdigits parsed for hex, |
2561 | | digits for E.164 */ |
2562 | |
|
2563 | 0 | if(slen > LDNS_MAX_RDFLEN*2) |
2564 | 0 | return LDNS_WIREPARSE_ERR_LABEL_OVERFLOW; |
2565 | 0 | if(*len < 1) |
2566 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
2567 | 0 | if(*s == 0) { |
2568 | | /* empty string */ |
2569 | 0 | rd[0] = 0; |
2570 | 0 | *len = 1; |
2571 | 0 | return LDNS_WIREPARSE_ERR_OK; |
2572 | 0 | } |
2573 | 0 | if(s[0] == '+') { |
2574 | 0 | rd[0] = 1; /* E.164 format */ |
2575 | | /* digits '0'..'9', with skipped dots. */ |
2576 | 0 | s++; |
2577 | 0 | while(*s) { |
2578 | 0 | if(isspace((unsigned char)*s) || *s == '.') { |
2579 | 0 | s++; |
2580 | 0 | continue; |
2581 | 0 | } |
2582 | 0 | if(*s < '0' || *s > '9') |
2583 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX, s-str); |
2584 | 0 | if(*len < dlen + 2) |
2585 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL, |
2586 | 0 | s-str); |
2587 | 0 | rd[dlen+1] = *s++; |
2588 | 0 | dlen++; |
2589 | 0 | } |
2590 | 0 | *len = dlen+1; |
2591 | 0 | return LDNS_WIREPARSE_ERR_OK; |
2592 | 0 | } |
2593 | | |
2594 | 0 | rd[0] = 0; /* AESA format */ |
2595 | | /* hex, with skipped dots. */ |
2596 | 0 | while(*s) { |
2597 | 0 | if(isspace((unsigned char)*s) || *s == '.') { |
2598 | 0 | s++; |
2599 | 0 | continue; |
2600 | 0 | } |
2601 | 0 | if(!isxdigit((unsigned char)*s)) |
2602 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_HEX, s-str); |
2603 | 0 | if(*len < dlen/2 + 2) |
2604 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL, |
2605 | 0 | s-str); |
2606 | 0 | if((dlen&1)==0) |
2607 | 0 | rd[dlen/2 + 1] = (uint8_t)sldns_hexdigit_to_int(*s++) * 16; |
2608 | 0 | else rd[dlen/2 + 1] += sldns_hexdigit_to_int(*s++); |
2609 | 0 | dlen++; |
2610 | 0 | } |
2611 | 0 | if((dlen&1)!=0) |
2612 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_HEX, s-str); |
2613 | 0 | *len = dlen/2 + 1; |
2614 | 0 | return LDNS_WIREPARSE_ERR_OK; |
2615 | 0 | } |
2616 | | |
2617 | | int sldns_str2wire_ipseckey_buf(const char* str, uint8_t* rd, size_t* len) |
2618 | 0 | { |
2619 | 0 | size_t gwlen = 0, keylen = 0; |
2620 | 0 | int s; |
2621 | 0 | uint8_t gwtype; |
2622 | 0 | char token[512]; |
2623 | 0 | sldns_buffer strbuf; |
2624 | 0 | sldns_buffer_init_frm_data(&strbuf, (uint8_t*)str, strlen(str)); |
2625 | |
|
2626 | 0 | if(*len < 3) |
2627 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
2628 | | /* precedence */ |
2629 | 0 | if(sldns_bget_token(&strbuf, token, "\t\n ", sizeof(token)) <= 0) |
2630 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_INVALID_STR, |
2631 | 0 | sldns_buffer_position(&strbuf)); |
2632 | 0 | rd[0] = (uint8_t)atoi(token); |
2633 | | /* gateway_type */ |
2634 | 0 | if(sldns_bget_token(&strbuf, token, "\t\n ", sizeof(token)) <= 0) |
2635 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_INVALID_STR, |
2636 | 0 | sldns_buffer_position(&strbuf)); |
2637 | 0 | rd[1] = (uint8_t)atoi(token); |
2638 | 0 | gwtype = rd[1]; |
2639 | | /* algorithm */ |
2640 | 0 | if(sldns_bget_token(&strbuf, token, "\t\n ", sizeof(token)) <= 0) |
2641 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_INVALID_STR, |
2642 | 0 | sldns_buffer_position(&strbuf)); |
2643 | 0 | rd[2] = (uint8_t)atoi(token); |
2644 | | |
2645 | | /* gateway */ |
2646 | 0 | if(sldns_bget_token(&strbuf, token, "\t\n ", sizeof(token)) <= 0) |
2647 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_INVALID_STR, |
2648 | 0 | sldns_buffer_position(&strbuf)); |
2649 | 0 | if(gwtype == 0) { |
2650 | | /* NOGATEWAY */ |
2651 | 0 | if(strcmp(token, ".") != 0) |
2652 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_INVALID_STR, |
2653 | 0 | sldns_buffer_position(&strbuf)); |
2654 | 0 | gwlen = 0; |
2655 | 0 | } else if(gwtype == 1) { |
2656 | | /* IP4 */ |
2657 | 0 | gwlen = *len - 3; |
2658 | 0 | s = sldns_str2wire_a_buf(token, rd+3, &gwlen); |
2659 | 0 | if(s) return RET_ERR_SHIFT(s, sldns_buffer_position(&strbuf)); |
2660 | 0 | } else if(gwtype == 2) { |
2661 | | /* IP6 */ |
2662 | 0 | gwlen = *len - 3; |
2663 | 0 | s = sldns_str2wire_aaaa_buf(token, rd+3, &gwlen); |
2664 | 0 | if(s) return RET_ERR_SHIFT(s, sldns_buffer_position(&strbuf)); |
2665 | 0 | } else if(gwtype == 3) { |
2666 | | /* DNAME */ |
2667 | 0 | gwlen = *len - 3; |
2668 | 0 | s = sldns_str2wire_dname_buf(token, rd+3, &gwlen); |
2669 | 0 | if(s) return RET_ERR_SHIFT(s, sldns_buffer_position(&strbuf)); |
2670 | 0 | } else { |
2671 | | /* unknown gateway type */ |
2672 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_INVALID_STR, |
2673 | 0 | sldns_buffer_position(&strbuf)); |
2674 | 0 | } |
2675 | | /* double check for size */ |
2676 | 0 | if(*len < 3 + gwlen) |
2677 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL, |
2678 | 0 | sldns_buffer_position(&strbuf)); |
2679 | | |
2680 | | /* publickey in remainder of strbuf */ |
2681 | 0 | keylen = *len - 3 - gwlen; |
2682 | 0 | s = sldns_str2wire_b64_buf((const char*)sldns_buffer_current(&strbuf), |
2683 | 0 | rd+3+gwlen, &keylen); |
2684 | 0 | if(s) return RET_ERR_SHIFT(s, sldns_buffer_position(&strbuf)); |
2685 | |
|
2686 | 0 | *len = 3 + gwlen + keylen; |
2687 | 0 | return LDNS_WIREPARSE_ERR_OK; |
2688 | 0 | } |
2689 | | |
2690 | | int sldns_str2wire_nsec3_salt_buf(const char* str, uint8_t* rd, size_t* len) |
2691 | 0 | { |
2692 | 0 | int i, salt_length_str = (int)strlen(str); |
2693 | 0 | if (salt_length_str == 1 && str[0] == '-') { |
2694 | 0 | salt_length_str = 0; |
2695 | 0 | } else if (salt_length_str % 2 != 0) { |
2696 | 0 | return LDNS_WIREPARSE_ERR_SYNTAX_HEX; |
2697 | 0 | } |
2698 | 0 | if (salt_length_str > 512) |
2699 | 0 | return LDNS_WIREPARSE_ERR_SYNTAX_HEX; |
2700 | 0 | if(*len < 1+(size_t)salt_length_str / 2) |
2701 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
2702 | 0 | rd[0] = (uint8_t) (salt_length_str / 2); |
2703 | 0 | for (i = 0; i < salt_length_str; i += 2) { |
2704 | 0 | if (isxdigit((unsigned char)str[i]) && |
2705 | 0 | isxdigit((unsigned char)str[i+1])) { |
2706 | 0 | rd[1+i/2] = (uint8_t)(sldns_hexdigit_to_int(str[i])*16 |
2707 | 0 | + sldns_hexdigit_to_int(str[i+1])); |
2708 | 0 | } else { |
2709 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_HEX, i); |
2710 | 0 | } |
2711 | 0 | } |
2712 | 0 | *len = 1 + (size_t)rd[0]; |
2713 | 0 | return LDNS_WIREPARSE_ERR_OK; |
2714 | 0 | } |
2715 | | |
2716 | | int sldns_str2wire_ilnp64_buf(const char* str, uint8_t* rd, size_t* len) |
2717 | 0 | { |
2718 | 0 | unsigned int a, b, c, d; |
2719 | 0 | uint16_t shorts[4]; |
2720 | 0 | int l; |
2721 | 0 | if(*len < sizeof(shorts)) |
2722 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
2723 | | |
2724 | 0 | if (sscanf(str, "%4x:%4x:%4x:%4x%n", &a, &b, &c, &d, &l) != 4 || |
2725 | 0 | l != (int)strlen(str) || /* more data to read */ |
2726 | 0 | strpbrk(str, "+-") /* signed hexes */ |
2727 | 0 | ) |
2728 | 0 | return LDNS_WIREPARSE_ERR_SYNTAX_ILNP64; |
2729 | 0 | shorts[0] = htons(a); |
2730 | 0 | shorts[1] = htons(b); |
2731 | 0 | shorts[2] = htons(c); |
2732 | 0 | shorts[3] = htons(d); |
2733 | 0 | memmove(rd, &shorts, sizeof(shorts)); |
2734 | 0 | *len = sizeof(shorts); |
2735 | 0 | return LDNS_WIREPARSE_ERR_OK; |
2736 | 0 | } |
2737 | | |
2738 | | int sldns_str2wire_eui48_buf(const char* str, uint8_t* rd, size_t* len) |
2739 | 0 | { |
2740 | 0 | unsigned int a, b, c, d, e, f; |
2741 | 0 | int l; |
2742 | |
|
2743 | 0 | if(*len < 6) |
2744 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
2745 | 0 | if (sscanf(str, "%2x-%2x-%2x-%2x-%2x-%2x%n", |
2746 | 0 | &a, &b, &c, &d, &e, &f, &l) != 6 || |
2747 | 0 | l != (int)strlen(str)) |
2748 | 0 | return LDNS_WIREPARSE_ERR_SYNTAX_EUI48; |
2749 | 0 | rd[0] = a; |
2750 | 0 | rd[1] = b; |
2751 | 0 | rd[2] = c; |
2752 | 0 | rd[3] = d; |
2753 | 0 | rd[4] = e; |
2754 | 0 | rd[5] = f; |
2755 | 0 | *len = 6; |
2756 | 0 | return LDNS_WIREPARSE_ERR_OK; |
2757 | 0 | } |
2758 | | |
2759 | | int sldns_str2wire_eui64_buf(const char* str, uint8_t* rd, size_t* len) |
2760 | 0 | { |
2761 | 0 | unsigned int a, b, c, d, e, f, g, h; |
2762 | 0 | int l; |
2763 | |
|
2764 | 0 | if(*len < 8) |
2765 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
2766 | 0 | if (sscanf(str, "%2x-%2x-%2x-%2x-%2x-%2x-%2x-%2x%n", |
2767 | 0 | &a, &b, &c, &d, &e, &f, &g, &h, &l) != 8 || |
2768 | 0 | l != (int)strlen(str)) |
2769 | 0 | return LDNS_WIREPARSE_ERR_SYNTAX_EUI64; |
2770 | 0 | rd[0] = a; |
2771 | 0 | rd[1] = b; |
2772 | 0 | rd[2] = c; |
2773 | 0 | rd[3] = d; |
2774 | 0 | rd[4] = e; |
2775 | 0 | rd[5] = f; |
2776 | 0 | rd[6] = g; |
2777 | 0 | rd[7] = h; |
2778 | 0 | *len = 8; |
2779 | 0 | return LDNS_WIREPARSE_ERR_OK; |
2780 | 0 | } |
2781 | | |
2782 | | int sldns_str2wire_unquoted_buf(const char* str, uint8_t* rd, size_t* len) |
2783 | 0 | { |
2784 | 0 | return sldns_str2wire_str_buf(str, rd, len); |
2785 | 0 | } |
2786 | | |
2787 | | int sldns_str2wire_tag_buf(const char* str, uint8_t* rd, size_t* len) |
2788 | 0 | { |
2789 | 0 | size_t slen = strlen(str); |
2790 | 0 | const char* ptr; |
2791 | |
|
2792 | 0 | if (slen > 255) |
2793 | 0 | return LDNS_WIREPARSE_ERR_SYNTAX_TAG; |
2794 | 0 | if(*len < slen+1) |
2795 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
2796 | 0 | for (ptr = str; *ptr; ptr++) { |
2797 | 0 | if(!isalnum((unsigned char)*ptr)) |
2798 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_TAG, ptr-str); |
2799 | 0 | } |
2800 | 0 | rd[0] = (uint8_t)slen; |
2801 | 0 | memmove(rd+1, str, slen); |
2802 | 0 | *len = slen+1; |
2803 | 0 | return LDNS_WIREPARSE_ERR_OK; |
2804 | 0 | } |
2805 | | |
2806 | | int sldns_str2wire_long_str_buf(const char* str, uint8_t* rd, size_t* len) |
2807 | 0 | { |
2808 | 0 | uint8_t ch = 0; |
2809 | 0 | const char* pstr = str; |
2810 | 0 | size_t length = 0; |
2811 | | |
2812 | | /* Fill data with parsed bytes */ |
2813 | 0 | while (sldns_parse_char(&ch, &pstr)) { |
2814 | 0 | if(*len < length+1) |
2815 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
2816 | 0 | rd[length++] = ch; |
2817 | 0 | } |
2818 | 0 | if(!pstr) |
2819 | 0 | return LDNS_WIREPARSE_ERR_SYNTAX_BAD_ESCAPE; |
2820 | 0 | *len = length; |
2821 | 0 | return LDNS_WIREPARSE_ERR_OK; |
2822 | 0 | } |
2823 | | |
2824 | | int sldns_str2wire_hip_buf(const char* str, uint8_t* rd, size_t* len) |
2825 | 0 | { |
2826 | 0 | char* s, *end; |
2827 | 0 | int e; |
2828 | 0 | size_t hitlen, pklen = 0; |
2829 | | /* presentation format: |
2830 | | * pk-algo HIThex pubkeybase64 |
2831 | | * wireformat: |
2832 | | * hitlen[1byte] pkalgo[1byte] pubkeylen[2byte] [hit] [pubkey] */ |
2833 | 0 | if(*len < 4) |
2834 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
2835 | | |
2836 | | /* read PK algorithm */ |
2837 | 0 | rd[1] = (uint8_t)strtol((char*)str, &s, 10); |
2838 | 0 | if(*s != ' ') |
2839 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_INT, s-(char*)str); |
2840 | 0 | s++; |
2841 | 0 | while(*s == ' ') |
2842 | 0 | s++; |
2843 | | |
2844 | | /* read HIT hex tag */ |
2845 | | /* zero terminate the tag (replace later) */ |
2846 | 0 | end = strchr(s, ' '); |
2847 | 0 | if(!end) return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX, s-(char*)str); |
2848 | 0 | *end = 0; |
2849 | 0 | hitlen = *len - 4; |
2850 | 0 | if((e = sldns_str2wire_hex_buf(s, rd+4, &hitlen)) != 0) { |
2851 | 0 | *end = ' '; |
2852 | 0 | return RET_ERR_SHIFT(e, s-(char*)str); |
2853 | 0 | } |
2854 | 0 | if(hitlen > 255) { |
2855 | 0 | *end = ' '; |
2856 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_LABEL_OVERFLOW, s-(char*)str+255*2); |
2857 | 0 | } |
2858 | 0 | rd[0] = (uint8_t)hitlen; |
2859 | 0 | *end = ' '; |
2860 | 0 | s = end+1; |
2861 | | |
2862 | | /* read pubkey base64 sequence */ |
2863 | 0 | pklen = *len - 4 - hitlen; |
2864 | 0 | if((e = sldns_str2wire_b64_buf(s, rd+4+hitlen, &pklen)) != 0) |
2865 | 0 | return RET_ERR_SHIFT(e, s-(char*)str); |
2866 | 0 | if(pklen > 65535) |
2867 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_LABEL_OVERFLOW, s-(char*)str+65535); |
2868 | 0 | sldns_write_uint16(rd+2, (uint16_t)pklen); |
2869 | |
|
2870 | 0 | *len = 4 + hitlen + pklen; |
2871 | 0 | return LDNS_WIREPARSE_ERR_OK; |
2872 | 0 | } |
2873 | | |
2874 | | int sldns_str2wire_int16_data_buf(const char* str, uint8_t* rd, size_t* len) |
2875 | 0 | { |
2876 | 0 | char* s; |
2877 | 0 | int n; |
2878 | 0 | n = strtol(str, &s, 10); |
2879 | 0 | if(n < 0) /* negative number not allowed */ |
2880 | 0 | return LDNS_WIREPARSE_ERR_SYNTAX; |
2881 | 0 | if(*len < ((size_t)n)+2) |
2882 | 0 | return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL; |
2883 | 0 | if(n > 65535) |
2884 | 0 | return LDNS_WIREPARSE_ERR_LABEL_OVERFLOW; |
2885 | | |
2886 | 0 | if(n == 0) { |
2887 | 0 | sldns_write_uint16(rd, 0); |
2888 | 0 | *len = 2; |
2889 | 0 | return LDNS_WIREPARSE_ERR_OK; |
2890 | 0 | } |
2891 | 0 | if(*s != ' ') |
2892 | 0 | return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_INT, s-(char*)str); |
2893 | 0 | s++; |
2894 | 0 | while(*s == ' ') |
2895 | 0 | s++; |
2896 | |
|
2897 | 0 | n = sldns_b64_pton(s, rd+2, (*len)-2); |
2898 | 0 | if(n < 0) |
2899 | 0 | return LDNS_WIREPARSE_ERR_SYNTAX_B64; |
2900 | 0 | sldns_write_uint16(rd, (uint16_t)n); |
2901 | 0 | *len = ((size_t)n)+2; |
2902 | 0 | return LDNS_WIREPARSE_ERR_OK; |
2903 | 0 | } |